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Finding the Fourth Proportional to 621,415.20, 932,122.80 and 556,461.30

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Solution

The fourth proportional to 621,415.20, 932,122.80 and 556,461.30 is: 834,691.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,415.20 : 932,122.80 = 556,461.30 : x
  2. Step 2: Convert to fraction form
    621,415.20/932,122.80 = 556,461.30/x
  3. Step 3: Cross multiply
    621,415.20x = 932,122.80 × 556,461.30
  4. Step 4: Simplify right side
    621,415.20x = 518,690,265,047.64
  5. Step 5: Solve for x
    x = 518,690,265,047.64/621,415.20
  6. Step 6: Final answer
    x = 834,691.95

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Double scale
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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.