Home / 1,242.32-1,862.28-1,135.40

Finding the Fourth Proportional to 1,242.32, 1,862.28 and 1,135.40

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Solution

The fourth proportional to 1,242.32, 1,862.28 and 1,135.40 is: 1,702.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.32 : 1,862.28 = 1,135.40 : x
  2. Step 2: Convert to fraction form
    1,242.32/1,862.28 = 1,135.40/x
  3. Step 3: Cross multiply
    1,242.32x = 1,862.28 × 1,135.40
  4. Step 4: Simplify right side
    1,242.32x = 2,114,432.71
  5. Step 5: Solve for x
    x = 2,114,432.71/1,242.32
  6. Step 6: Final answer
    x = 1,702.00

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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.