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Finding the Fourth Proportional to 866.61, 1,298.85 and 500.64

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Solution

The fourth proportional to 866.61, 1,298.85 and 500.64 is: 750.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.61 : 1,298.85 = 500.64 : x
  2. Step 2: Convert to fraction form
    866.61/1,298.85 = 500.64/x
  3. Step 3: Cross multiply
    866.61x = 1,298.85 × 500.64
  4. Step 4: Simplify right side
    866.61x = 650,256.26
  5. Step 5: Solve for x
    x = 650,256.26/866.61
  6. Step 6: Final answer
    x = 750.34

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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.