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Finding the Fourth Proportional to 887.20, 1,224.20 and 494.18

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Solution

The fourth proportional to 887.20, 1,224.20 and 494.18 is: 681.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.20 : 1,224.20 = 494.18 : x
  2. Step 2: Convert to fraction form
    887.20/1,224.20 = 494.18/x
  3. Step 3: Cross multiply
    887.20x = 1,224.20 × 494.18
  4. Step 4: Simplify right side
    887.20x = 604,975.16
  5. Step 5: Solve for x
    x = 604,975.16/887.20
  6. Step 6: Final answer
    x = 681.89

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1.5x scale

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.