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Finding the Fourth Proportional to 432.65, 595.35 and 391.25

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Solution

The fourth proportional to 432.65, 595.35 and 391.25 is: 538.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.65 : 595.35 = 391.25 : x
  2. Step 2: Convert to fraction form
    432.65/595.35 = 391.25/x
  3. Step 3: Cross multiply
    432.65x = 595.35 × 391.25
  4. Step 4: Simplify right side
    432.65x = 232,930.69
  5. Step 5: Solve for x
    x = 232,930.69/432.65
  6. Step 6: Final answer
    x = 538.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.