Home / 1,455.12-2,178.36-876.24

Finding the Fourth Proportional to 1,455.12, 2,178.36 and 876.24

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Solution

The fourth proportional to 1,455.12, 2,178.36 and 876.24 is: 1,311.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.12 : 2,178.36 = 876.24 : x
  2. Step 2: Convert to fraction form
    1,455.12/2,178.36 = 876.24/x
  3. Step 3: Cross multiply
    1,455.12x = 2,178.36 × 876.24
  4. Step 4: Simplify right side
    1,455.12x = 1,908,766.17
  5. Step 5: Solve for x
    x = 1,908,766.17/1,455.12
  6. Step 6: Final answer
    x = 1,311.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.