Home / 1,151.40-1,587.11-1,056.06

Finding the Fourth Proportional to 1,151.40, 1,587.11 and 1,056.06

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Solution

The fourth proportional to 1,151.40, 1,587.11 and 1,056.06 is: 1,455.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.40 : 1,587.11 = 1,056.06 : x
  2. Step 2: Convert to fraction form
    1,151.40/1,587.11 = 1,056.06/x
  3. Step 3: Cross multiply
    1,151.40x = 1,587.11 × 1,056.06
  4. Step 4: Simplify right side
    1,151.40x = 1,676,078.11
  5. Step 5: Solve for x
    x = 1,676,078.11/1,151.40
  6. Step 6: Final answer
    x = 1,455.69

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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.