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Finding the Fourth Proportional to 865,720.60, 1,298,580.90 and 706,288.30

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Solution

The fourth proportional to 865,720.60, 1,298,580.90 and 706,288.30 is: 1,059,432.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,720.60 : 1,298,580.90 = 706,288.30 : x
  2. Step 2: Convert to fraction form
    865,720.60/1,298,580.90 = 706,288.30/x
  3. Step 3: Cross multiply
    865,720.60x = 1,298,580.90 × 706,288.30
  4. Step 4: Simplify right side
    865,720.60x = 917,172,496,273.47
  5. Step 5: Solve for x
    x = 917,172,496,273.47/865,720.60
  6. Step 6: Final answer
    x = 1,059,432.45

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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.