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Finding the Fourth Proportional to 503.55, 751.34 and 422.55

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Solution

The fourth proportional to 503.55, 751.34 and 422.55 is: 630.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.55 : 751.34 = 422.55 : x
  2. Step 2: Convert to fraction form
    503.55/751.34 = 422.55/x
  3. Step 3: Cross multiply
    503.55x = 751.34 × 422.55
  4. Step 4: Simplify right side
    503.55x = 317,479.77
  5. Step 5: Solve for x
    x = 317,479.77/503.55
  6. Step 6: Final answer
    x = 630.48

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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.