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Finding the Fourth Proportional to 1,036.49, 1,554.68 and 387.18

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Solution

The fourth proportional to 1,036.49, 1,554.68 and 387.18 is: 580.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.49 : 1,554.68 = 387.18 : x
  2. Step 2: Convert to fraction form
    1,036.49/1,554.68 = 387.18/x
  3. Step 3: Cross multiply
    1,036.49x = 1,554.68 × 387.18
  4. Step 4: Simplify right side
    1,036.49x = 601,933.23
  5. Step 5: Solve for x
    x = 601,933.23/1,036.49
  6. Step 6: Final answer
    x = 580.74

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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.