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Finding the Fourth Proportional to 1,084.62, 1,627.11 and 646.23

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Solution

The fourth proportional to 1,084.62, 1,627.11 and 646.23 is: 969.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.62 : 1,627.11 = 646.23 : x
  2. Step 2: Convert to fraction form
    1,084.62/1,627.11 = 646.23/x
  3. Step 3: Cross multiply
    1,084.62x = 1,627.11 × 646.23
  4. Step 4: Simplify right side
    1,084.62x = 1,051,486.06
  5. Step 5: Solve for x
    x = 1,051,486.06/1,084.62
  6. Step 6: Final answer
    x = 969.46

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Double scale
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1.5x scale

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.