Home / 522,037.80-781,890.30-428,725.80

Finding the Fourth Proportional to 522,037.80, 781,890.30 and 428,725.80

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Solution

The fourth proportional to 522,037.80, 781,890.30 and 428,725.80 is: 642,130.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,037.80 : 781,890.30 = 428,725.80 : x
  2. Step 2: Convert to fraction form
    522,037.80/781,890.30 = 428,725.80/x
  3. Step 3: Cross multiply
    522,037.80x = 781,890.30 × 428,725.80
  4. Step 4: Simplify right side
    522,037.80x = 335,216,544,379.74
  5. Step 5: Solve for x
    x = 335,216,544,379.74/522,037.80
  6. Step 6: Final answer
    x = 642,130.79

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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.