Home / 1,318.20-1,977.34-452.50

Finding the Fourth Proportional to 1,318.20, 1,977.34 and 452.50

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Solution

The fourth proportional to 1,318.20, 1,977.34 and 452.50 is: 678.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.20 : 1,977.34 = 452.50 : x
  2. Step 2: Convert to fraction form
    1,318.20/1,977.34 = 452.50/x
  3. Step 3: Cross multiply
    1,318.20x = 1,977.34 × 452.50
  4. Step 4: Simplify right side
    1,318.20x = 894,746.35
  5. Step 5: Solve for x
    x = 894,746.35/1,318.20
  6. Step 6: Final answer
    x = 678.76

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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.