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Finding the Fourth Proportional to 503.04, 753.24 and 421.68

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Solution

The fourth proportional to 503.04, 753.24 and 421.68 is: 631.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.04 : 753.24 = 421.68 : x
  2. Step 2: Convert to fraction form
    503.04/753.24 = 421.68/x
  3. Step 3: Cross multiply
    503.04x = 753.24 × 421.68
  4. Step 4: Simplify right side
    503.04x = 317,626.24
  5. Step 5: Solve for x
    x = 317,626.24/503.04
  6. Step 6: Final answer
    x = 631.41

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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.