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Finding the Fourth Proportional to 526.68, 726.18 and 479.86

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Solution

The fourth proportional to 526.68, 726.18 and 479.86 is: 661.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.68 : 726.18 = 479.86 : x
  2. Step 2: Convert to fraction form
    526.68/726.18 = 479.86/x
  3. Step 3: Cross multiply
    526.68x = 726.18 × 479.86
  4. Step 4: Simplify right side
    526.68x = 348,461.12
  5. Step 5: Solve for x
    x = 348,461.12/526.68
  6. Step 6: Final answer
    x = 661.62

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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.