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Finding the Fourth Proportional to 1,011.48, 1,395.68 and 569.30

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Solution

The fourth proportional to 1,011.48, 1,395.68 and 569.30 is: 785.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.48 : 1,395.68 = 569.30 : x
  2. Step 2: Convert to fraction form
    1,011.48/1,395.68 = 569.30/x
  3. Step 3: Cross multiply
    1,011.48x = 1,395.68 × 569.30
  4. Step 4: Simplify right side
    1,011.48x = 794,550.80
  5. Step 5: Solve for x
    x = 794,550.80/1,011.48
  6. Step 6: Final answer
    x = 785.53

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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.