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Finding the Fourth Proportional to 1,011.02, 1,395.18 and 591.44

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Solution

The fourth proportional to 1,011.02, 1,395.18 and 591.44 is: 816.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.02 : 1,395.18 = 591.44 : x
  2. Step 2: Convert to fraction form
    1,011.02/1,395.18 = 591.44/x
  3. Step 3: Cross multiply
    1,011.02x = 1,395.18 × 591.44
  4. Step 4: Simplify right side
    1,011.02x = 825,158.28
  5. Step 5: Solve for x
    x = 825,158.28/1,011.02
  6. Step 6: Final answer
    x = 816.17

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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.