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Finding the Fourth Proportional to 621.96, 928.67 and 530.61

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Solution

The fourth proportional to 621.96, 928.67 and 530.61 is: 792.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.96 : 928.67 = 530.61 : x
  2. Step 2: Convert to fraction form
    621.96/928.67 = 530.61/x
  3. Step 3: Cross multiply
    621.96x = 928.67 × 530.61
  4. Step 4: Simplify right side
    621.96x = 492,761.59
  5. Step 5: Solve for x
    x = 492,761.59/621.96
  6. Step 6: Final answer
    x = 792.27

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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.