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Finding the Fourth Proportional to 503.12, 753.53 and 423.61

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Solution

The fourth proportional to 503.12, 753.53 and 423.61 is: 634.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.12 : 753.53 = 423.61 : x
  2. Step 2: Convert to fraction form
    503.12/753.53 = 423.61/x
  3. Step 3: Cross multiply
    503.12x = 753.53 × 423.61
  4. Step 4: Simplify right side
    503.12x = 319,202.84
  5. Step 5: Solve for x
    x = 319,202.84/503.12
  6. Step 6: Final answer
    x = 634.45

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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.