Home / 687,415.20-1,031,122.80-615,098.40

Finding the Fourth Proportional to 687,415.20, 1,031,122.80 and 615,098.40

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Solution

The fourth proportional to 687,415.20, 1,031,122.80 and 615,098.40 is: 922,647.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,415.20 : 1,031,122.80 = 615,098.40 : x
  2. Step 2: Convert to fraction form
    687,415.20/1,031,122.80 = 615,098.40/x
  3. Step 3: Cross multiply
    687,415.20x = 1,031,122.80 × 615,098.40
  4. Step 4: Simplify right side
    687,415.20x = 634,241,984,483.52
  5. Step 5: Solve for x
    x = 634,241,984,483.52/687,415.20
  6. Step 6: Final answer
    x = 922,647.60

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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.