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Finding the Fourth Proportional to 478,314.20, 660,120.18 and 357,245.32

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Solution

The fourth proportional to 478,314.20, 660,120.18 and 357,245.32 is: 493,033.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,314.20 : 660,120.18 = 357,245.32 : x
  2. Step 2: Convert to fraction form
    478,314.20/660,120.18 = 357,245.32/x
  3. Step 3: Cross multiply
    478,314.20x = 660,120.18 × 357,245.32
  4. Step 4: Simplify right side
    478,314.20x = 235,824,844,942.56
  5. Step 5: Solve for x
    x = 235,824,844,942.56/478,314.20
  6. Step 6: Final answer
    x = 493,033.33

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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.