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Finding the Fourth Proportional to 1,301.60, 1,952.76 and 521.90

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Solution

The fourth proportional to 1,301.60, 1,952.76 and 521.90 is: 782.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,301.60 : 1,952.76 = 521.90 : x
  2. Step 2: Convert to fraction form
    1,301.60/1,952.76 = 521.90/x
  3. Step 3: Cross multiply
    1,301.60x = 1,952.76 × 521.90
  4. Step 4: Simplify right side
    1,301.60x = 1,019,145.44
  5. Step 5: Solve for x
    x = 1,019,145.44/1,301.60
  6. Step 6: Final answer
    x = 782.99

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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.