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Finding the Fourth Proportional to 701.78, 1,053.30 and 479.36

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Solution

The fourth proportional to 701.78, 1,053.30 and 479.36 is: 719.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.78 : 1,053.30 = 479.36 : x
  2. Step 2: Convert to fraction form
    701.78/1,053.30 = 479.36/x
  3. Step 3: Cross multiply
    701.78x = 1,053.30 × 479.36
  4. Step 4: Simplify right side
    701.78x = 504,909.89
  5. Step 5: Solve for x
    x = 504,909.89/701.78
  6. Step 6: Final answer
    x = 719.47

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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.