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Finding the Fourth Proportional to 1,011.35, 1,395.69 and 569.23

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Solution

The fourth proportional to 1,011.35, 1,395.69 and 569.23 is: 785.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.35 : 1,395.69 = 569.23 : x
  2. Step 2: Convert to fraction form
    1,011.35/1,395.69 = 569.23/x
  3. Step 3: Cross multiply
    1,011.35x = 1,395.69 × 569.23
  4. Step 4: Simplify right side
    1,011.35x = 794,468.62
  5. Step 5: Solve for x
    x = 794,468.62/1,011.35
  6. Step 6: Final answer
    x = 785.55

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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.