Home / 687,741.80-1,031,612.70-651,000.20

Finding the Fourth Proportional to 687,741.80, 1,031,612.70 and 651,000.20

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Solution

The fourth proportional to 687,741.80, 1,031,612.70 and 651,000.20 is: 976,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,741.80 : 1,031,612.70 = 651,000.20 : x
  2. Step 2: Convert to fraction form
    687,741.80/1,031,612.70 = 651,000.20/x
  3. Step 3: Cross multiply
    687,741.80x = 1,031,612.70 × 651,000.20
  4. Step 4: Simplify right side
    687,741.80x = 671,580,074,022.54
  5. Step 5: Solve for x
    x = 671,580,074,022.54/687,741.80
  6. Step 6: Final answer
    x = 976,500.30

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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.