Home / 1,587.51-2,190.75-888.87

Finding the Fourth Proportional to 1,587.51, 2,190.75 and 888.87

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Solution

The fourth proportional to 1,587.51, 2,190.75 and 888.87 is: 1,226.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.51 : 2,190.75 = 888.87 : x
  2. Step 2: Convert to fraction form
    1,587.51/2,190.75 = 888.87/x
  3. Step 3: Cross multiply
    1,587.51x = 2,190.75 × 888.87
  4. Step 4: Simplify right side
    1,587.51x = 1,947,291.95
  5. Step 5: Solve for x
    x = 1,947,291.95/1,587.51
  6. Step 6: Final answer
    x = 1,226.63

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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.