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Finding the Fourth Proportional to 1,075.71, 1,613.39 and 490.58

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Solution

The fourth proportional to 1,075.71, 1,613.39 and 490.58 is: 735.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.71 : 1,613.39 = 490.58 : x
  2. Step 2: Convert to fraction form
    1,075.71/1,613.39 = 490.58/x
  3. Step 3: Cross multiply
    1,075.71x = 1,613.39 × 490.58
  4. Step 4: Simplify right side
    1,075.71x = 791,486.35
  5. Step 5: Solve for x
    x = 791,486.35/1,075.71
  6. Step 6: Final answer
    x = 735.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.