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Finding the Fourth Proportional to 651,411.20, 977,116.80 and 208,179.20

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Solution

The fourth proportional to 651,411.20, 977,116.80 and 208,179.20 is: 312,268.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,411.20 : 977,116.80 = 208,179.20 : x
  2. Step 2: Convert to fraction form
    651,411.20/977,116.80 = 208,179.20/x
  3. Step 3: Cross multiply
    651,411.20x = 977,116.80 × 208,179.20
  4. Step 4: Simplify right side
    651,411.20x = 203,415,393,730.56
  5. Step 5: Solve for x
    x = 203,415,393,730.56/651,411.20
  6. Step 6: Final answer
    x = 312,268.80

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Half scale
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Double scale
Find fourth proportional to 651,412.20, 977,118.30 and 208,180.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.