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Finding the Fourth Proportional to 763.47, 1,143.39 and 589.74

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Solution

The fourth proportional to 763.47, 1,143.39 and 589.74 is: 883.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.47 : 1,143.39 = 589.74 : x
  2. Step 2: Convert to fraction form
    763.47/1,143.39 = 589.74/x
  3. Step 3: Cross multiply
    763.47x = 1,143.39 × 589.74
  4. Step 4: Simplify right side
    763.47x = 674,302.82
  5. Step 5: Solve for x
    x = 674,302.82/763.47
  6. Step 6: Final answer
    x = 883.21

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Double scale
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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.