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Finding the Fourth Proportional to 1,627.80, 2,442.06 and 858.12

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Solution

The fourth proportional to 1,627.80, 2,442.06 and 858.12 is: 1,287.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,627.80 : 2,442.06 = 858.12 : x
  2. Step 2: Convert to fraction form
    1,627.80/2,442.06 = 858.12/x
  3. Step 3: Cross multiply
    1,627.80x = 2,442.06 × 858.12
  4. Step 4: Simplify right side
    1,627.80x = 2,095,580.53
  5. Step 5: Solve for x
    x = 2,095,580.53/1,627.80
  6. Step 6: Final answer
    x = 1,287.37

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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.