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Finding the Fourth Proportional to 904.92, 1,247.58 and 719.03

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Solution

The fourth proportional to 904.92, 1,247.58 and 719.03 is: 991.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.92 : 1,247.58 = 719.03 : x
  2. Step 2: Convert to fraction form
    904.92/1,247.58 = 719.03/x
  3. Step 3: Cross multiply
    904.92x = 1,247.58 × 719.03
  4. Step 4: Simplify right side
    904.92x = 897,041.21
  5. Step 5: Solve for x
    x = 897,041.21/904.92
  6. Step 6: Final answer
    x = 991.29

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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.