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Finding the Fourth Proportional to 439,891.60, 660,639.30 and 384,779.20

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Solution

The fourth proportional to 439,891.60, 660,639.30 and 384,779.20 is: 577,870.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,891.60 : 660,639.30 = 384,779.20 : x
  2. Step 2: Convert to fraction form
    439,891.60/660,639.30 = 384,779.20/x
  3. Step 3: Cross multiply
    439,891.60x = 660,639.30 × 384,779.20
  4. Step 4: Simplify right side
    439,891.60x = 254,200,261,342.56
  5. Step 5: Solve for x
    x = 254,200,261,342.56/439,891.60
  6. Step 6: Final answer
    x = 577,870.23

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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.