Home / 1,587.32-2,190.38-888.60

Finding the Fourth Proportional to 1,587.32, 2,190.38 and 888.60

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Solution

The fourth proportional to 1,587.32, 2,190.38 and 888.60 is: 1,226.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.32 : 2,190.38 = 888.60 : x
  2. Step 2: Convert to fraction form
    1,587.32/2,190.38 = 888.60/x
  3. Step 3: Cross multiply
    1,587.32x = 2,190.38 × 888.60
  4. Step 4: Simplify right side
    1,587.32x = 1,946,371.67
  5. Step 5: Solve for x
    x = 1,946,371.67/1,587.32
  6. Step 6: Final answer
    x = 1,226.20

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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.