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Finding the Fourth Proportional to 956.15, 1,434.63 and 522.80

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Solution

The fourth proportional to 956.15, 1,434.63 and 522.80 is: 784.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.15 : 1,434.63 = 522.80 : x
  2. Step 2: Convert to fraction form
    956.15/1,434.63 = 522.80/x
  3. Step 3: Cross multiply
    956.15x = 1,434.63 × 522.80
  4. Step 4: Simplify right side
    956.15x = 750,024.56
  5. Step 5: Solve for x
    x = 750,024.56/956.15
  6. Step 6: Final answer
    x = 784.42

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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.