Home / 831,770.20-1,248,087.30-388,538.20

Finding the Fourth Proportional to 831,770.20, 1,248,087.30 and 388,538.20

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Solution

The fourth proportional to 831,770.20, 1,248,087.30 and 388,538.20 is: 583,009.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,770.20 : 1,248,087.30 = 388,538.20 : x
  2. Step 2: Convert to fraction form
    831,770.20/1,248,087.30 = 388,538.20/x
  3. Step 3: Cross multiply
    831,770.20x = 1,248,087.30 × 388,538.20
  4. Step 4: Simplify right side
    831,770.20x = 484,929,592,984.86
  5. Step 5: Solve for x
    x = 484,929,592,984.86/831,770.20
  6. Step 6: Final answer
    x = 583,009.10

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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.