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Finding the Fourth Proportional to 661,504.10, 992,256.15 and 392,065.70

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Solution

The fourth proportional to 661,504.10, 992,256.15 and 392,065.70 is: 588,098.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,504.10 : 992,256.15 = 392,065.70 : x
  2. Step 2: Convert to fraction form
    661,504.10/992,256.15 = 392,065.70/x
  3. Step 3: Cross multiply
    661,504.10x = 992,256.15 × 392,065.70
  4. Step 4: Simplify right side
    661,504.10x = 389,029,602,029.06
  5. Step 5: Solve for x
    x = 389,029,602,029.06/661,504.10
  6. Step 6: Final answer
    x = 588,098.55

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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.