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Finding the Fourth Proportional to 686.02, 1,027.60 and 500.80

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Solution

The fourth proportional to 686.02, 1,027.60 and 500.80 is: 750.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.02 : 1,027.60 = 500.80 : x
  2. Step 2: Convert to fraction form
    686.02/1,027.60 = 500.80/x
  3. Step 3: Cross multiply
    686.02x = 1,027.60 × 500.80
  4. Step 4: Simplify right side
    686.02x = 514,622.08
  5. Step 5: Solve for x
    x = 514,622.08/686.02
  6. Step 6: Final answer
    x = 750.16

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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.