Home / 1,068.57-1,471.66-921.15

Finding the Fourth Proportional to 1,068.57, 1,471.66 and 921.15

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Solution

The fourth proportional to 1,068.57, 1,471.66 and 921.15 is: 1,268.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,068.57 : 1,471.66 = 921.15 : x
  2. Step 2: Convert to fraction form
    1,068.57/1,471.66 = 921.15/x
  3. Step 3: Cross multiply
    1,068.57x = 1,471.66 × 921.15
  4. Step 4: Simplify right side
    1,068.57x = 1,355,619.61
  5. Step 5: Solve for x
    x = 1,355,619.61/1,068.57
  6. Step 6: Final answer
    x = 1,268.63

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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.