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Finding the Fourth Proportional to 956.60, 1,434.18 and 493.34

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Solution

The fourth proportional to 956.60, 1,434.18 and 493.34 is: 739.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.60 : 1,434.18 = 493.34 : x
  2. Step 2: Convert to fraction form
    956.60/1,434.18 = 493.34/x
  3. Step 3: Cross multiply
    956.60x = 1,434.18 × 493.34
  4. Step 4: Simplify right side
    956.60x = 707,538.36
  5. Step 5: Solve for x
    x = 707,538.36/956.60
  6. Step 6: Final answer
    x = 739.64

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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.