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Finding the Fourth Proportional to 403,407.80, 605,111.70 and 359,862.20

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Solution

The fourth proportional to 403,407.80, 605,111.70 and 359,862.20 is: 539,793.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,407.80 : 605,111.70 = 359,862.20 : x
  2. Step 2: Convert to fraction form
    403,407.80/605,111.70 = 359,862.20/x
  3. Step 3: Cross multiply
    403,407.80x = 605,111.70 × 359,862.20
  4. Step 4: Simplify right side
    403,407.80x = 217,756,827,607.74
  5. Step 5: Solve for x
    x = 217,756,827,607.74/403,407.80
  6. Step 6: Final answer
    x = 539,793.30

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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.