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Finding the Fourth Proportional to 409,852.80, 614,779.20 and 143,585.55

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Solution

The fourth proportional to 409,852.80, 614,779.20 and 143,585.55 is: 215,378.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,852.80 : 614,779.20 = 143,585.55 : x
  2. Step 2: Convert to fraction form
    409,852.80/614,779.20 = 143,585.55/x
  3. Step 3: Cross multiply
    409,852.80x = 614,779.20 × 143,585.55
  4. Step 4: Simplify right side
    409,852.80x = 88,273,409,560.56
  5. Step 5: Solve for x
    x = 88,273,409,560.56/409,852.80
  6. Step 6: Final answer
    x = 215,378.33

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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.