Home / 918,132.30-1,377,198.45-287,109.90

Finding the Fourth Proportional to 918,132.30, 1,377,198.45 and 287,109.90

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Solution

The fourth proportional to 918,132.30, 1,377,198.45 and 287,109.90 is: 430,664.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,132.30 : 1,377,198.45 = 287,109.90 : x
  2. Step 2: Convert to fraction form
    918,132.30/1,377,198.45 = 287,109.90/x
  3. Step 3: Cross multiply
    918,132.30x = 1,377,198.45 × 287,109.90
  4. Step 4: Simplify right side
    918,132.30x = 395,407,309,259.66
  5. Step 5: Solve for x
    x = 395,407,309,259.66/918,132.30
  6. Step 6: Final answer
    x = 430,664.85

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1.5x scale

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.