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Finding the Fourth Proportional to 478,420.71, 660,229.02 and 263,559.30

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Solution

The fourth proportional to 478,420.71, 660,229.02 and 263,559.30 is: 363,716.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,420.71 : 660,229.02 = 263,559.30 : x
  2. Step 2: Convert to fraction form
    478,420.71/660,229.02 = 263,559.30/x
  3. Step 3: Cross multiply
    478,420.71x = 660,229.02 × 263,559.30
  4. Step 4: Simplify right side
    478,420.71x = 174,009,498,350.89
  5. Step 5: Solve for x
    x = 174,009,498,350.89/478,420.71
  6. Step 6: Final answer
    x = 363,716.48

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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.