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Finding the Fourth Proportional to 493,330.60, 739,995.90 and 431,122.60

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Solution

The fourth proportional to 493,330.60, 739,995.90 and 431,122.60 is: 646,683.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,330.60 : 739,995.90 = 431,122.60 : x
  2. Step 2: Convert to fraction form
    493,330.60/739,995.90 = 431,122.60/x
  3. Step 3: Cross multiply
    493,330.60x = 739,995.90 × 431,122.60
  4. Step 4: Simplify right side
    493,330.60x = 319,028,956,397.34
  5. Step 5: Solve for x
    x = 319,028,956,397.34/493,330.60
  6. Step 6: Final answer
    x = 646,683.90

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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.