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Finding the Fourth Proportional to 678,060.42, 935,491.03 and 387,463.20

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Solution

The fourth proportional to 678,060.42, 935,491.03 and 387,463.20 is: 534,566.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,060.42 : 935,491.03 = 387,463.20 : x
  2. Step 2: Convert to fraction form
    678,060.42/935,491.03 = 387,463.20/x
  3. Step 3: Cross multiply
    678,060.42x = 935,491.03 × 387,463.20
  4. Step 4: Simplify right side
    678,060.42x = 362,468,348,055.10
  5. Step 5: Solve for x
    x = 362,468,348,055.10/678,060.42
  6. Step 6: Final answer
    x = 534,566.44

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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.