Home / 687,512.20-1,031,268.30-477,560.20

Finding the Fourth Proportional to 687,512.20, 1,031,268.30 and 477,560.20

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Solution

The fourth proportional to 687,512.20, 1,031,268.30 and 477,560.20 is: 716,340.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,512.20 : 1,031,268.30 = 477,560.20 : x
  2. Step 2: Convert to fraction form
    687,512.20/1,031,268.30 = 477,560.20/x
  3. Step 3: Cross multiply
    687,512.20x = 1,031,268.30 × 477,560.20
  4. Step 4: Simplify right side
    687,512.20x = 492,492,695,601.66
  5. Step 5: Solve for x
    x = 492,492,695,601.66/687,512.20
  6. Step 6: Final answer
    x = 716,340.30

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Double scale
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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.