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Finding the Fourth Proportional to 1,045.17, 1,568.43 and 395.90

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Solution

The fourth proportional to 1,045.17, 1,568.43 and 395.90 is: 594.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.17 : 1,568.43 = 395.90 : x
  2. Step 2: Convert to fraction form
    1,045.17/1,568.43 = 395.90/x
  3. Step 3: Cross multiply
    1,045.17x = 1,568.43 × 395.90
  4. Step 4: Simplify right side
    1,045.17x = 620,933.59
  5. Step 5: Solve for x
    x = 620,933.59/1,045.17
  6. Step 6: Final answer
    x = 594.10

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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.