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Finding the Fourth Proportional to 649,343.40, 974,015.10 and 491,879.40

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Solution

The fourth proportional to 649,343.40, 974,015.10 and 491,879.40 is: 737,819.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,343.40 : 974,015.10 = 491,879.40 : x
  2. Step 2: Convert to fraction form
    649,343.40/974,015.10 = 491,879.40/x
  3. Step 3: Cross multiply
    649,343.40x = 974,015.10 × 491,879.40
  4. Step 4: Simplify right side
    649,343.40x = 479,097,962,978.94
  5. Step 5: Solve for x
    x = 479,097,962,978.94/649,343.40
  6. Step 6: Final answer
    x = 737,819.10

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Half scale
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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.