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Finding the Fourth Proportional to 743.65, 1,115.07 and 590.56

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Solution

The fourth proportional to 743.65, 1,115.07 and 590.56 is: 885.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.65 : 1,115.07 = 590.56 : x
  2. Step 2: Convert to fraction form
    743.65/1,115.07 = 590.56/x
  3. Step 3: Cross multiply
    743.65x = 1,115.07 × 590.56
  4. Step 4: Simplify right side
    743.65x = 658,515.74
  5. Step 5: Solve for x
    x = 658,515.74/743.65
  6. Step 6: Final answer
    x = 885.52

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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.