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Finding the Fourth Proportional to 639,414.53, 956,208.30 and 477,421.90

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Solution

The fourth proportional to 639,414.53, 956,208.30 and 477,421.90 is: 713,957.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,414.53 : 956,208.30 = 477,421.90 : x
  2. Step 2: Convert to fraction form
    639,414.53/956,208.30 = 477,421.90/x
  3. Step 3: Cross multiply
    639,414.53x = 956,208.30 × 477,421.90
  4. Step 4: Simplify right side
    639,414.53x = 456,514,783,381.77
  5. Step 5: Solve for x
    x = 456,514,783,381.77/639,414.53
  6. Step 6: Final answer
    x = 713,957.48

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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.