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Finding the Fourth Proportional to 429,498.70, 644,248.05 and 405,004.30

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Solution

The fourth proportional to 429,498.70, 644,248.05 and 405,004.30 is: 607,506.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,498.70 : 644,248.05 = 405,004.30 : x
  2. Step 2: Convert to fraction form
    429,498.70/644,248.05 = 405,004.30/x
  3. Step 3: Cross multiply
    429,498.70x = 644,248.05 × 405,004.30
  4. Step 4: Simplify right side
    429,498.70x = 260,923,230,516.62
  5. Step 5: Solve for x
    x = 260,923,230,516.62/429,498.70
  6. Step 6: Final answer
    x = 607,506.45

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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.