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Finding the Fourth Proportional to 1,011.20, 1,395.52 and 569.14

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Solution

The fourth proportional to 1,011.20, 1,395.52 and 569.14 is: 785.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.20 : 1,395.52 = 569.14 : x
  2. Step 2: Convert to fraction form
    1,011.20/1,395.52 = 569.14/x
  3. Step 3: Cross multiply
    1,011.20x = 1,395.52 × 569.14
  4. Step 4: Simplify right side
    1,011.20x = 794,241.34
  5. Step 5: Solve for x
    x = 794,241.34/1,011.20
  6. Step 6: Final answer
    x = 785.45

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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.