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Finding the Fourth Proportional to 654.28, 977.75 and 531.16

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Solution

The fourth proportional to 654.28, 977.75 and 531.16 is: 793.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.28 : 977.75 = 531.16 : x
  2. Step 2: Convert to fraction form
    654.28/977.75 = 531.16/x
  3. Step 3: Cross multiply
    654.28x = 977.75 × 531.16
  4. Step 4: Simplify right side
    654.28x = 519,341.69
  5. Step 5: Solve for x
    x = 519,341.69/654.28
  6. Step 6: Final answer
    x = 793.76

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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.