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Finding the Fourth Proportional to 478,473.50, 660,568.34 and 317,546.75

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Solution

The fourth proportional to 478,473.50, 660,568.34 and 317,546.75 is: 438,396.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,473.50 : 660,568.34 = 317,546.75 : x
  2. Step 2: Convert to fraction form
    478,473.50/660,568.34 = 317,546.75/x
  3. Step 3: Cross multiply
    478,473.50x = 660,568.34 × 317,546.75
  4. Step 4: Simplify right side
    478,473.50x = 209,761,331,965.18
  5. Step 5: Solve for x
    x = 209,761,331,965.18/478,473.50
  6. Step 6: Final answer
    x = 438,396.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.