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Finding the Fourth Proportional to 422.98, 631.12 and 373.74

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Solution

The fourth proportional to 422.98, 631.12 and 373.74 is: 557.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.98 : 631.12 = 373.74 : x
  2. Step 2: Convert to fraction form
    422.98/631.12 = 373.74/x
  3. Step 3: Cross multiply
    422.98x = 631.12 × 373.74
  4. Step 4: Simplify right side
    422.98x = 235,874.79
  5. Step 5: Solve for x
    x = 235,874.79/422.98
  6. Step 6: Final answer
    x = 557.65

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Find fourth proportional to 211.49, 315.56 and 186.87
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Double scale
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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.