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Finding the Fourth Proportional to 835.04, 1,253.28 and 578.72

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Solution

The fourth proportional to 835.04, 1,253.28 and 578.72 is: 868.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.04 : 1,253.28 = 578.72 : x
  2. Step 2: Convert to fraction form
    835.04/1,253.28 = 578.72/x
  3. Step 3: Cross multiply
    835.04x = 1,253.28 × 578.72
  4. Step 4: Simplify right side
    835.04x = 725,298.20
  5. Step 5: Solve for x
    x = 725,298.20/835.04
  6. Step 6: Final answer
    x = 868.58

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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.