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Finding the Fourth Proportional to 526.71, 726.86 and 316.89

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Solution

The fourth proportional to 526.71, 726.86 and 316.89 is: 437.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.71 : 726.86 = 316.89 : x
  2. Step 2: Convert to fraction form
    526.71/726.86 = 316.89/x
  3. Step 3: Cross multiply
    526.71x = 726.86 × 316.89
  4. Step 4: Simplify right side
    526.71x = 230,329.45
  5. Step 5: Solve for x
    x = 230,329.45/526.71
  6. Step 6: Final answer
    x = 437.30

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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.