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Finding the Fourth Proportional to 852.79, 1,177.01 and 521.41

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Solution

The fourth proportional to 852.79, 1,177.01 and 521.41 is: 719.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.79 : 1,177.01 = 521.41 : x
  2. Step 2: Convert to fraction form
    852.79/1,177.01 = 521.41/x
  3. Step 3: Cross multiply
    852.79x = 1,177.01 × 521.41
  4. Step 4: Simplify right side
    852.79x = 613,704.78
  5. Step 5: Solve for x
    x = 613,704.78/852.79
  6. Step 6: Final answer
    x = 719.64

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1.5x scale

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.