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Finding the Fourth Proportional to 593.61, 890.72 and 421.39

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Solution

The fourth proportional to 593.61, 890.72 and 421.39 is: 632.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    593.61 : 890.72 = 421.39 : x
  2. Step 2: Convert to fraction form
    593.61/890.72 = 421.39/x
  3. Step 3: Cross multiply
    593.61x = 890.72 × 421.39
  4. Step 4: Simplify right side
    593.61x = 375,340.50
  5. Step 5: Solve for x
    x = 375,340.50/593.61
  6. Step 6: Final answer
    x = 632.30

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Double scale
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Similar ratio
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1.5x scale

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.