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Finding the Fourth Proportional to 478,359.88, 660,183.31 and 357,291.20

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Solution

The fourth proportional to 478,359.88, 660,183.31 and 357,291.20 is: 493,096.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,359.88 : 660,183.31 = 357,291.20 : x
  2. Step 2: Convert to fraction form
    478,359.88/660,183.31 = 357,291.20/x
  3. Step 3: Cross multiply
    478,359.88x = 660,183.31 × 357,291.20
  4. Step 4: Simplify right side
    478,359.88x = 235,877,689,146.94
  5. Step 5: Solve for x
    x = 235,877,689,146.94/478,359.88
  6. Step 6: Final answer
    x = 493,096.73

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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.