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Finding the Fourth Proportional to 1,011.28, 1,395.49 and 569.19

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Solution

The fourth proportional to 1,011.28, 1,395.49 and 569.19 is: 785.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.28 : 1,395.49 = 569.19 : x
  2. Step 2: Convert to fraction form
    1,011.28/1,395.49 = 569.19/x
  3. Step 3: Cross multiply
    1,011.28x = 1,395.49 × 569.19
  4. Step 4: Simplify right side
    1,011.28x = 794,298.95
  5. Step 5: Solve for x
    x = 794,298.95/1,011.28
  6. Step 6: Final answer
    x = 785.44

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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.