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Finding the Fourth Proportional to 711.60, 1,067.40 and 529.35

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Solution

The fourth proportional to 711.60, 1,067.40 and 529.35 is: 794.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.60 : 1,067.40 = 529.35 : x
  2. Step 2: Convert to fraction form
    711.60/1,067.40 = 529.35/x
  3. Step 3: Cross multiply
    711.60x = 1,067.40 × 529.35
  4. Step 4: Simplify right side
    711.60x = 565,028.19
  5. Step 5: Solve for x
    x = 565,028.19/711.60
  6. Step 6: Final answer
    x = 794.03

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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.