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Finding the Fourth Proportional to 520.84, 781.26 and 358.03

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Solution

The fourth proportional to 520.84, 781.26 and 358.03 is: 537.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.84 : 781.26 = 358.03 : x
  2. Step 2: Convert to fraction form
    520.84/781.26 = 358.03/x
  3. Step 3: Cross multiply
    520.84x = 781.26 × 358.03
  4. Step 4: Simplify right side
    520.84x = 279,714.52
  5. Step 5: Solve for x
    x = 279,714.52/520.84
  6. Step 6: Final answer
    x = 537.05

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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.