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Finding the Fourth Proportional to 478,313.20, 660,118.80 and 357,244.32

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Solution

The fourth proportional to 478,313.20, 660,118.80 and 357,244.32 is: 493,031.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,313.20 : 660,118.80 = 357,244.32 : x
  2. Step 2: Convert to fraction form
    478,313.20/660,118.80 = 357,244.32/x
  3. Step 3: Cross multiply
    478,313.20x = 660,118.80 × 357,244.32
  4. Step 4: Simplify right side
    478,313.20x = 235,823,691,825.22
  5. Step 5: Solve for x
    x = 235,823,691,825.22/478,313.20
  6. Step 6: Final answer
    x = 493,031.95

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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.