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Finding the Fourth Proportional to 1,368.49, 2,053.56 and 547.15

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Solution

The fourth proportional to 1,368.49, 2,053.56 and 547.15 is: 821.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.49 : 2,053.56 = 547.15 : x
  2. Step 2: Convert to fraction form
    1,368.49/2,053.56 = 547.15/x
  3. Step 3: Cross multiply
    1,368.49x = 2,053.56 × 547.15
  4. Step 4: Simplify right side
    1,368.49x = 1,123,605.35
  5. Step 5: Solve for x
    x = 1,123,605.35/1,368.49
  6. Step 6: Final answer
    x = 821.05

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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.