Home / 1,184.32-1,635.20-742.40

Finding the Fourth Proportional to 1,184.32, 1,635.20 and 742.40

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Solution

The fourth proportional to 1,184.32, 1,635.20 and 742.40 is: 1,025.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,184.32 : 1,635.20 = 742.40 : x
  2. Step 2: Convert to fraction form
    1,184.32/1,635.20 = 742.40/x
  3. Step 3: Cross multiply
    1,184.32x = 1,635.20 × 742.40
  4. Step 4: Simplify right side
    1,184.32x = 1,213,972.48
  5. Step 5: Solve for x
    x = 1,213,972.48/1,184.32
  6. Step 6: Final answer
    x = 1,025.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.