Home / 1,316.88-1,972.08-1,112.76

Finding the Fourth Proportional to 1,316.88, 1,972.08 and 1,112.76

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Solution

The fourth proportional to 1,316.88, 1,972.08 and 1,112.76 is: 1,666.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.88 : 1,972.08 = 1,112.76 : x
  2. Step 2: Convert to fraction form
    1,316.88/1,972.08 = 1,112.76/x
  3. Step 3: Cross multiply
    1,316.88x = 1,972.08 × 1,112.76
  4. Step 4: Simplify right side
    1,316.88x = 2,194,451.74
  5. Step 5: Solve for x
    x = 2,194,451.74/1,316.88
  6. Step 6: Final answer
    x = 1,666.40

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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.