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Finding the Fourth Proportional to 887.62, 1,225.02 and 666.19

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Solution

The fourth proportional to 887.62, 1,225.02 and 666.19 is: 919.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.62 : 1,225.02 = 666.19 : x
  2. Step 2: Convert to fraction form
    887.62/1,225.02 = 666.19/x
  3. Step 3: Cross multiply
    887.62x = 1,225.02 × 666.19
  4. Step 4: Simplify right side
    887.62x = 816,096.07
  5. Step 5: Solve for x
    x = 816,096.07/887.62
  6. Step 6: Final answer
    x = 919.42

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Double scale
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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.