Home / 1,215.38-1,677.36-1,177.10

Finding the Fourth Proportional to 1,215.38, 1,677.36 and 1,177.10

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Solution

The fourth proportional to 1,215.38, 1,677.36 and 1,177.10 is: 1,624.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.38 : 1,677.36 = 1,177.10 : x
  2. Step 2: Convert to fraction form
    1,215.38/1,677.36 = 1,177.10/x
  3. Step 3: Cross multiply
    1,215.38x = 1,677.36 × 1,177.10
  4. Step 4: Simplify right side
    1,215.38x = 1,974,420.46
  5. Step 5: Solve for x
    x = 1,974,420.46/1,215.38
  6. Step 6: Final answer
    x = 1,624.53

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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.