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Finding the Fourth Proportional to 478,547.80, 718,512.90 and 361,043.80

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Solution

The fourth proportional to 478,547.80, 718,512.90 and 361,043.80 is: 542,087.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,547.80 : 718,512.90 = 361,043.80 : x
  2. Step 2: Convert to fraction form
    478,547.80/718,512.90 = 361,043.80/x
  3. Step 3: Cross multiply
    478,547.80x = 718,512.90 × 361,043.80
  4. Step 4: Simplify right side
    478,547.80x = 259,414,627,765.02
  5. Step 5: Solve for x
    x = 259,414,627,765.02/478,547.80
  6. Step 6: Final answer
    x = 542,087.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.