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Finding the Fourth Proportional to 902.94, 1,354.40 and 719.88

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Solution

The fourth proportional to 902.94, 1,354.40 and 719.88 is: 1,079.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.94 : 1,354.40 = 719.88 : x
  2. Step 2: Convert to fraction form
    902.94/1,354.40 = 719.88/x
  3. Step 3: Cross multiply
    902.94x = 1,354.40 × 719.88
  4. Step 4: Simplify right side
    902.94x = 975,005.47
  5. Step 5: Solve for x
    x = 975,005.47/902.94
  6. Step 6: Final answer
    x = 1,079.81

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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.