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Finding the Fourth Proportional to 621,805.60, 932,708.40 and 472,506.40

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Solution

The fourth proportional to 621,805.60, 932,708.40 and 472,506.40 is: 708,759.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,805.60 : 932,708.40 = 472,506.40 : x
  2. Step 2: Convert to fraction form
    621,805.60/932,708.40 = 472,506.40/x
  3. Step 3: Cross multiply
    621,805.60x = 932,708.40 × 472,506.40
  4. Step 4: Simplify right side
    621,805.60x = 440,710,688,333.76
  5. Step 5: Solve for x
    x = 440,710,688,333.76/621,805.60
  6. Step 6: Final answer
    x = 708,759.60

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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.