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Finding the Fourth Proportional to 871.70, 1,204.01 and 651.63

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Solution

The fourth proportional to 871.70, 1,204.01 and 651.63 is: 900.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.70 : 1,204.01 = 651.63 : x
  2. Step 2: Convert to fraction form
    871.70/1,204.01 = 651.63/x
  3. Step 3: Cross multiply
    871.70x = 1,204.01 × 651.63
  4. Step 4: Simplify right side
    871.70x = 784,565.78
  5. Step 5: Solve for x
    x = 784,565.78/871.70
  6. Step 6: Final answer
    x = 900.05

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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.