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Finding the Fourth Proportional to 901.76, 1,344.71 and 879.89

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Solution

The fourth proportional to 901.76, 1,344.71 and 879.89 is: 1,312.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.76 : 1,344.71 = 879.89 : x
  2. Step 2: Convert to fraction form
    901.76/1,344.71 = 879.89/x
  3. Step 3: Cross multiply
    901.76x = 1,344.71 × 879.89
  4. Step 4: Simplify right side
    901.76x = 1,183,192.36
  5. Step 5: Solve for x
    x = 1,183,192.36/901.76
  6. Step 6: Final answer
    x = 1,312.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.