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Finding the Fourth Proportional to 1,116.08, 1,539.36 and 722.69

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Solution

The fourth proportional to 1,116.08, 1,539.36 and 722.69 is: 996.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.08 : 1,539.36 = 722.69 : x
  2. Step 2: Convert to fraction form
    1,116.08/1,539.36 = 722.69/x
  3. Step 3: Cross multiply
    1,116.08x = 1,539.36 × 722.69
  4. Step 4: Simplify right side
    1,116.08x = 1,112,472.38
  5. Step 5: Solve for x
    x = 1,112,472.38/1,116.08
  6. Step 6: Final answer
    x = 996.77

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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.