Home / 309,938.20-464,907.30-85,298.20

Finding the Fourth Proportional to 309,938.20, 464,907.30 and 85,298.20

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Solution

The fourth proportional to 309,938.20, 464,907.30 and 85,298.20 is: 127,947.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,938.20 : 464,907.30 = 85,298.20 : x
  2. Step 2: Convert to fraction form
    309,938.20/464,907.30 = 85,298.20/x
  3. Step 3: Cross multiply
    309,938.20x = 464,907.30 × 85,298.20
  4. Step 4: Simplify right side
    309,938.20x = 39,655,755,856.86
  5. Step 5: Solve for x
    x = 39,655,755,856.86/309,938.20
  6. Step 6: Final answer
    x = 127,947.30

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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.