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Finding the Fourth Proportional to 782.27, 1,078.55 and 502.01

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Solution

The fourth proportional to 782.27, 1,078.55 and 502.01 is: 692.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.27 : 1,078.55 = 502.01 : x
  2. Step 2: Convert to fraction form
    782.27/1,078.55 = 502.01/x
  3. Step 3: Cross multiply
    782.27x = 1,078.55 × 502.01
  4. Step 4: Simplify right side
    782.27x = 541,444.14
  5. Step 5: Solve for x
    x = 541,444.14/782.27
  6. Step 6: Final answer
    x = 692.14

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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.