Home / 1,127.18-1,690.70-305.55

Finding the Fourth Proportional to 1,127.18, 1,690.70 and 305.55

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Solution

The fourth proportional to 1,127.18, 1,690.70 and 305.55 is: 458.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.18 : 1,690.70 = 305.55 : x
  2. Step 2: Convert to fraction form
    1,127.18/1,690.70 = 305.55/x
  3. Step 3: Cross multiply
    1,127.18x = 1,690.70 × 305.55
  4. Step 4: Simplify right side
    1,127.18x = 516,591.86
  5. Step 5: Solve for x
    x = 516,591.86/1,127.18
  6. Step 6: Final answer
    x = 458.30

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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.