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Finding the Fourth Proportional to 763.99, 1,053.91 and 528.18

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Solution

The fourth proportional to 763.99, 1,053.91 and 528.18 is: 728.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.99 : 1,053.91 = 528.18 : x
  2. Step 2: Convert to fraction form
    763.99/1,053.91 = 528.18/x
  3. Step 3: Cross multiply
    763.99x = 1,053.91 × 528.18
  4. Step 4: Simplify right side
    763.99x = 556,654.18
  5. Step 5: Solve for x
    x = 556,654.18/763.99
  6. Step 6: Final answer
    x = 728.61

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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.