Home / 389,723.60-584,585.40-109,288.40

Finding the Fourth Proportional to 389,723.60, 584,585.40 and 109,288.40

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Solution

The fourth proportional to 389,723.60, 584,585.40 and 109,288.40 is: 163,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,723.60 : 584,585.40 = 109,288.40 : x
  2. Step 2: Convert to fraction form
    389,723.60/584,585.40 = 109,288.40/x
  3. Step 3: Cross multiply
    389,723.60x = 584,585.40 × 109,288.40
  4. Step 4: Simplify right side
    389,723.60x = 63,888,403,029.36
  5. Step 5: Solve for x
    x = 63,888,403,029.36/389,723.60
  6. Step 6: Final answer
    x = 163,932.60

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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.