Home / 1,188.18-1,630.80-1,077.48

Finding the Fourth Proportional to 1,188.18, 1,630.80 and 1,077.48

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Solution

The fourth proportional to 1,188.18, 1,630.80 and 1,077.48 is: 1,478.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.18 : 1,630.80 = 1,077.48 : x
  2. Step 2: Convert to fraction form
    1,188.18/1,630.80 = 1,077.48/x
  3. Step 3: Cross multiply
    1,188.18x = 1,630.80 × 1,077.48
  4. Step 4: Simplify right side
    1,188.18x = 1,757,154.38
  5. Step 5: Solve for x
    x = 1,757,154.38/1,188.18
  6. Step 6: Final answer
    x = 1,478.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.