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Finding the Fourth Proportional to 636,781.88, 878,678.94 and 430,498.84

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Solution

The fourth proportional to 636,781.88, 878,678.94 and 430,498.84 is: 594,034.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,781.88 : 878,678.94 = 430,498.84 : x
  2. Step 2: Convert to fraction form
    636,781.88/878,678.94 = 430,498.84/x
  3. Step 3: Cross multiply
    636,781.88x = 878,678.94 × 430,498.84
  4. Step 4: Simplify right side
    636,781.88x = 378,270,264,402.43
  5. Step 5: Solve for x
    x = 378,270,264,402.43/636,781.88
  6. Step 6: Final answer
    x = 594,034.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.