Home / 1,154.08-1,739.65-1,087.20

Finding the Fourth Proportional to 1,154.08, 1,739.65 and 1,087.20

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Solution

The fourth proportional to 1,154.08, 1,739.65 and 1,087.20 is: 1,638.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.08 : 1,739.65 = 1,087.20 : x
  2. Step 2: Convert to fraction form
    1,154.08/1,739.65 = 1,087.20/x
  3. Step 3: Cross multiply
    1,154.08x = 1,739.65 × 1,087.20
  4. Step 4: Simplify right side
    1,154.08x = 1,891,347.48
  5. Step 5: Solve for x
    x = 1,891,347.48/1,154.08
  6. Step 6: Final answer
    x = 1,638.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.