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Finding the Fourth Proportional to 678,266.91, 935,973.92 and 402,636.53

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Solution

The fourth proportional to 678,266.91, 935,973.92 and 402,636.53 is: 555,617.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,266.91 : 935,973.92 = 402,636.53 : x
  2. Step 2: Convert to fraction form
    678,266.91/935,973.92 = 402,636.53/x
  3. Step 3: Cross multiply
    678,266.91x = 935,973.92 × 402,636.53
  4. Step 4: Simplify right side
    678,266.91x = 376,857,284,626.25
  5. Step 5: Solve for x
    x = 376,857,284,626.25/678,266.91
  6. Step 6: Final answer
    x = 555,617.97

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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.