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Finding the Fourth Proportional to 732, 1,010.22 and 421.50

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Solution

The fourth proportional to 732, 1,010.22 and 421.50 is: 581.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    732 : 1,010.22 = 421.50 : x
  2. Step 2: Convert to fraction form
    732/1,010.22 = 421.50/x
  3. Step 3: Cross multiply
    732x = 1,010.22 × 421.50
  4. Step 4: Simplify right side
    732x = 425,807.73
  5. Step 5: Solve for x
    x = 425,807.73/732
  6. Step 6: Final answer
    x = 581.70

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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.