Home / 1,585.12-2,187.36-886.60

Finding the Fourth Proportional to 1,585.12, 2,187.36 and 886.60

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Solution

The fourth proportional to 1,585.12, 2,187.36 and 886.60 is: 1,223.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.12 : 2,187.36 = 886.60 : x
  2. Step 2: Convert to fraction form
    1,585.12/2,187.36 = 886.60/x
  3. Step 3: Cross multiply
    1,585.12x = 2,187.36 × 886.60
  4. Step 4: Simplify right side
    1,585.12x = 1,939,313.38
  5. Step 5: Solve for x
    x = 1,939,313.38/1,585.12
  6. Step 6: Final answer
    x = 1,223.45

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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.