Home / 1,587.28-2,188.54-1,365.85

Finding the Fourth Proportional to 1,587.28, 2,188.54 and 1,365.85

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Solution

The fourth proportional to 1,587.28, 2,188.54 and 1,365.85 is: 1,883.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.28 : 2,188.54 = 1,365.85 : x
  2. Step 2: Convert to fraction form
    1,587.28/2,188.54 = 1,365.85/x
  3. Step 3: Cross multiply
    1,587.28x = 2,188.54 × 1,365.85
  4. Step 4: Simplify right side
    1,587.28x = 2,989,213.92
  5. Step 5: Solve for x
    x = 2,989,213.92/1,587.28
  6. Step 6: Final answer
    x = 1,883.23

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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.