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Finding the Fourth Proportional to 879.04, 1,211.01 and 613.00

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Solution

The fourth proportional to 879.04, 1,211.01 and 613.00 is: 844.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.04 : 1,211.01 = 613.00 : x
  2. Step 2: Convert to fraction form
    879.04/1,211.01 = 613.00/x
  3. Step 3: Cross multiply
    879.04x = 1,211.01 × 613.00
  4. Step 4: Simplify right side
    879.04x = 742,348.40
  5. Step 5: Solve for x
    x = 742,348.40/879.04
  6. Step 6: Final answer
    x = 844.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.