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Finding the Fourth Proportional to 662,652.60, 992,807.70 and 640,726.20

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Solution

The fourth proportional to 662,652.60, 992,807.70 and 640,726.20 is: 959,956.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,652.60 : 992,807.70 = 640,726.20 : x
  2. Step 2: Convert to fraction form
    662,652.60/992,807.70 = 640,726.20/x
  3. Step 3: Cross multiply
    662,652.60x = 992,807.70 × 640,726.20
  4. Step 4: Simplify right side
    662,652.60x = 636,117,904,951.74
  5. Step 5: Solve for x
    x = 636,117,904,951.74/662,652.60
  6. Step 6: Final answer
    x = 959,956.85

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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.