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Finding the Fourth Proportional to 389,474.65, 580,939.66 and 353,596.91

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Solution

The fourth proportional to 389,474.65, 580,939.66 and 353,596.91 is: 527,424.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,474.65 : 580,939.66 = 353,596.91 : x
  2. Step 2: Convert to fraction form
    389,474.65/580,939.66 = 353,596.91/x
  3. Step 3: Cross multiply
    389,474.65x = 580,939.66 × 353,596.91
  4. Step 4: Simplify right side
    389,474.65x = 205,418,466,904.47
  5. Step 5: Solve for x
    x = 205,418,466,904.47/389,474.65
  6. Step 6: Final answer
    x = 527,424.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.