Home / 687,742.20-1,031,613.30-477,790.20

Finding the Fourth Proportional to 687,742.20, 1,031,613.30 and 477,790.20

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Solution

The fourth proportional to 687,742.20, 1,031,613.30 and 477,790.20 is: 716,685.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,742.20 : 1,031,613.30 = 477,790.20 : x
  2. Step 2: Convert to fraction form
    687,742.20/1,031,613.30 = 477,790.20/x
  3. Step 3: Cross multiply
    687,742.20x = 1,031,613.30 × 477,790.20
  4. Step 4: Simplify right side
    687,742.20x = 492,894,724,929.66
  5. Step 5: Solve for x
    x = 492,894,724,929.66/687,742.20
  6. Step 6: Final answer
    x = 716,685.30

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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.