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Finding the Fourth Proportional to 835.04, 1,251.28 and 561.04

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Solution

The fourth proportional to 835.04, 1,251.28 and 561.04 is: 840.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.04 : 1,251.28 = 561.04 : x
  2. Step 2: Convert to fraction form
    835.04/1,251.28 = 561.04/x
  3. Step 3: Cross multiply
    835.04x = 1,251.28 × 561.04
  4. Step 4: Simplify right side
    835.04x = 702,018.13
  5. Step 5: Solve for x
    x = 702,018.13/835.04
  6. Step 6: Final answer
    x = 840.70

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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.