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Finding the Fourth Proportional to 760.34, 1,049.28 and 411.03

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Solution

The fourth proportional to 760.34, 1,049.28 and 411.03 is: 567.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.34 : 1,049.28 = 411.03 : x
  2. Step 2: Convert to fraction form
    760.34/1,049.28 = 411.03/x
  3. Step 3: Cross multiply
    760.34x = 1,049.28 × 411.03
  4. Step 4: Simplify right side
    760.34x = 431,285.98
  5. Step 5: Solve for x
    x = 431,285.98/760.34
  6. Step 6: Final answer
    x = 567.22

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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.