Home / 651,208.20-976,812.30-438,631.80

Finding the Fourth Proportional to 651,208.20, 976,812.30 and 438,631.80

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Solution

The fourth proportional to 651,208.20, 976,812.30 and 438,631.80 is: 657,947.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,208.20 : 976,812.30 = 438,631.80 : x
  2. Step 2: Convert to fraction form
    651,208.20/976,812.30 = 438,631.80/x
  3. Step 3: Cross multiply
    651,208.20x = 976,812.30 × 438,631.80
  4. Step 4: Simplify right side
    651,208.20x = 428,460,937,411.14
  5. Step 5: Solve for x
    x = 428,460,937,411.14/651,208.20
  6. Step 6: Final answer
    x = 657,947.70

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Half scale
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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.