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Finding the Fourth Proportional to 423,082.20, 634,623.30 and 403,399.20

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Solution

The fourth proportional to 423,082.20, 634,623.30 and 403,399.20 is: 605,098.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,082.20 : 634,623.30 = 403,399.20 : x
  2. Step 2: Convert to fraction form
    423,082.20/634,623.30 = 403,399.20/x
  3. Step 3: Cross multiply
    423,082.20x = 634,623.30 × 403,399.20
  4. Step 4: Simplify right side
    423,082.20x = 256,006,531,521.36
  5. Step 5: Solve for x
    x = 256,006,531,521.36/423,082.20
  6. Step 6: Final answer
    x = 605,098.80

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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.