Home / 765.03-1,147.30-302.70

Finding the Fourth Proportional to 765.03, 1,147.30 and 302.70

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Solution

The fourth proportional to 765.03, 1,147.30 and 302.70 is: 453.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.03 : 1,147.30 = 302.70 : x
  2. Step 2: Convert to fraction form
    765.03/1,147.30 = 302.70/x
  3. Step 3: Cross multiply
    765.03x = 1,147.30 × 302.70
  4. Step 4: Simplify right side
    765.03x = 347,287.71
  5. Step 5: Solve for x
    x = 347,287.71/765.03
  6. Step 6: Final answer
    x = 453.95

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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.