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Finding the Fourth Proportional to 760.91, 1,049.81 and 429.21

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Solution

The fourth proportional to 760.91, 1,049.81 and 429.21 is: 592.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.91 : 1,049.81 = 429.21 : x
  2. Step 2: Convert to fraction form
    760.91/1,049.81 = 429.21/x
  3. Step 3: Cross multiply
    760.91x = 1,049.81 × 429.21
  4. Step 4: Simplify right side
    760.91x = 450,586.80
  5. Step 5: Solve for x
    x = 450,586.80/760.91
  6. Step 6: Final answer
    x = 592.17

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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.