Home / 981,704.20-1,472,556.30-509,312.20

Finding the Fourth Proportional to 981,704.20, 1,472,556.30 and 509,312.20

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Solution

The fourth proportional to 981,704.20, 1,472,556.30 and 509,312.20 is: 763,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,704.20 : 1,472,556.30 = 509,312.20 : x
  2. Step 2: Convert to fraction form
    981,704.20/1,472,556.30 = 509,312.20/x
  3. Step 3: Cross multiply
    981,704.20x = 1,472,556.30 × 509,312.20
  4. Step 4: Simplify right side
    981,704.20x = 749,990,888,776.86
  5. Step 5: Solve for x
    x = 749,990,888,776.86/981,704.20
  6. Step 6: Final answer
    x = 763,968.30

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Double scale
Find fourth proportional to 981,705.20, 1,472,557.80 and 509,313.20
Similar ratio
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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.