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Finding the Fourth Proportional to 781,698, 1,172,248.10 and 426,522.18

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Solution

The fourth proportional to 781,698, 1,172,248.10 and 426,522.18 is: 639,620.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,698 : 1,172,248.10 = 426,522.18 : x
  2. Step 2: Convert to fraction form
    781,698/1,172,248.10 = 426,522.18/x
  3. Step 3: Cross multiply
    781,698x = 1,172,248.10 × 426,522.18
  4. Step 4: Simplify right side
    781,698x = 499,989,815,112.86
  5. Step 5: Solve for x
    x = 499,989,815,112.86/781,698
  6. Step 6: Final answer
    x = 639,620.18

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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.