Home / 1,294.15-1,931.28-1,155.75

Finding the Fourth Proportional to 1,294.15, 1,931.28 and 1,155.75

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Solution

The fourth proportional to 1,294.15, 1,931.28 and 1,155.75 is: 1,724.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.15 : 1,931.28 = 1,155.75 : x
  2. Step 2: Convert to fraction form
    1,294.15/1,931.28 = 1,155.75/x
  3. Step 3: Cross multiply
    1,294.15x = 1,931.28 × 1,155.75
  4. Step 4: Simplify right side
    1,294.15x = 2,232,076.86
  5. Step 5: Solve for x
    x = 2,232,076.86/1,294.15
  6. Step 6: Final answer
    x = 1,724.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.