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Finding the Fourth Proportional to 528.17, 787.95 and 502.65

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Solution

The fourth proportional to 528.17, 787.95 and 502.65 is: 749.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.17 : 787.95 = 502.65 : x
  2. Step 2: Convert to fraction form
    528.17/787.95 = 502.65/x
  3. Step 3: Cross multiply
    528.17x = 787.95 × 502.65
  4. Step 4: Simplify right side
    528.17x = 396,063.07
  5. Step 5: Solve for x
    x = 396,063.07/528.17
  6. Step 6: Final answer
    x = 749.89

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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.