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Finding the Fourth Proportional to 887.42, 1,223.65 and 607.79

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Solution

The fourth proportional to 887.42, 1,223.65 and 607.79 is: 838.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.42 : 1,223.65 = 607.79 : x
  2. Step 2: Convert to fraction form
    887.42/1,223.65 = 607.79/x
  3. Step 3: Cross multiply
    887.42x = 1,223.65 × 607.79
  4. Step 4: Simplify right side
    887.42x = 743,722.23
  5. Step 5: Solve for x
    x = 743,722.23/887.42
  6. Step 6: Final answer
    x = 838.07

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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.