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Finding the Fourth Proportional to 1,072.68, 1,470.66 and 1,053.24

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Solution

The fourth proportional to 1,072.68, 1,470.66 and 1,053.24 is: 1,444.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.68 : 1,470.66 = 1,053.24 : x
  2. Step 2: Convert to fraction form
    1,072.68/1,470.66 = 1,053.24/x
  3. Step 3: Cross multiply
    1,072.68x = 1,470.66 × 1,053.24
  4. Step 4: Simplify right side
    1,072.68x = 1,548,957.94
  5. Step 5: Solve for x
    x = 1,548,957.94/1,072.68
  6. Step 6: Final answer
    x = 1,444.01

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.