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Finding the Fourth Proportional to 760.79, 1,141.18 and 212.97

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Solution

The fourth proportional to 760.79, 1,141.18 and 212.97 is: 319.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.79 : 1,141.18 = 212.97 : x
  2. Step 2: Convert to fraction form
    760.79/1,141.18 = 212.97/x
  3. Step 3: Cross multiply
    760.79x = 1,141.18 × 212.97
  4. Step 4: Simplify right side
    760.79x = 243,033.88
  5. Step 5: Solve for x
    x = 243,033.88/760.79
  6. Step 6: Final answer
    x = 319.45

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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.