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Finding the Fourth Proportional to 678,231, 936,002.52 and 376,425

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Solution

The fourth proportional to 678,231, 936,002.52 and 376,425 is: 519,490.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,231 : 936,002.52 = 376,425 : x
  2. Step 2: Convert to fraction form
    678,231/936,002.52 = 376,425/x
  3. Step 3: Cross multiply
    678,231x = 936,002.52 × 376,425
  4. Step 4: Simplify right side
    678,231x = 352,334,748,591
  5. Step 5: Solve for x
    x = 352,334,748,591/678,231
  6. Step 6: Final answer
    x = 519,490.78

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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.