Home / 641,530.31-960,378.19-388,043.69

Finding the Fourth Proportional to 641,530.31, 960,378.19 and 388,043.69

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Solution

The fourth proportional to 641,530.31, 960,378.19 and 388,043.69 is: 580,905.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,530.31 : 960,378.19 = 388,043.69 : x
  2. Step 2: Convert to fraction form
    641,530.31/960,378.19 = 388,043.69/x
  3. Step 3: Cross multiply
    641,530.31x = 960,378.19 × 388,043.69
  4. Step 4: Simplify right side
    641,530.31x = 372,668,690,871.12
  5. Step 5: Solve for x
    x = 372,668,690,871.12/641,530.31
  6. Step 6: Final answer
    x = 580,905.82

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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.