Home / 1,587.61-2,190.70-888.81

Finding the Fourth Proportional to 1,587.61, 2,190.70 and 888.81

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Solution

The fourth proportional to 1,587.61, 2,190.70 and 888.81 is: 1,226.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.61 : 2,190.70 = 888.81 : x
  2. Step 2: Convert to fraction form
    1,587.61/2,190.70 = 888.81/x
  3. Step 3: Cross multiply
    1,587.61x = 2,190.70 × 888.81
  4. Step 4: Simplify right side
    1,587.61x = 1,947,116.07
  5. Step 5: Solve for x
    x = 1,947,116.07/1,587.61
  6. Step 6: Final answer
    x = 1,226.44

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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.