Home / 915,819.40-1,373,340.30-442,649.80

Finding the Fourth Proportional to 915,819.40, 1,373,340.30 and 442,649.80

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Solution

The fourth proportional to 915,819.40, 1,373,340.30 and 442,649.80 is: 663,786.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,819.40 : 1,373,340.30 = 442,649.80 : x
  2. Step 2: Convert to fraction form
    915,819.40/1,373,340.30 = 442,649.80/x
  3. Step 3: Cross multiply
    915,819.40x = 1,373,340.30 × 442,649.80
  4. Step 4: Simplify right side
    915,819.40x = 607,908,809,126.94
  5. Step 5: Solve for x
    x = 607,908,809,126.94/915,819.40
  6. Step 6: Final answer
    x = 663,786.78

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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.