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Finding the Fourth Proportional to 928.64, 1,281.43 and 530.27

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Solution

The fourth proportional to 928.64, 1,281.43 and 530.27 is: 731.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.64 : 1,281.43 = 530.27 : x
  2. Step 2: Convert to fraction form
    928.64/1,281.43 = 530.27/x
  3. Step 3: Cross multiply
    928.64x = 1,281.43 × 530.27
  4. Step 4: Simplify right side
    928.64x = 679,503.89
  5. Step 5: Solve for x
    x = 679,503.89/928.64
  6. Step 6: Final answer
    x = 731.72

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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.