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Finding the Fourth Proportional to 578,429.70, 868,681.35 and 420,836.10

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Solution

The fourth proportional to 578,429.70, 868,681.35 and 420,836.10 is: 632,008.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,429.70 : 868,681.35 = 420,836.10 : x
  2. Step 2: Convert to fraction form
    578,429.70/868,681.35 = 420,836.10/x
  3. Step 3: Cross multiply
    578,429.70x = 868,681.35 × 420,836.10
  4. Step 4: Simplify right side
    578,429.70x = 365,572,471,476.74
  5. Step 5: Solve for x
    x = 365,572,471,476.74/578,429.70
  6. Step 6: Final answer
    x = 632,008.47

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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.