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Finding the Fourth Proportional to 1,522.90, 2,101.60 and 859.74

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Solution

The fourth proportional to 1,522.90, 2,101.60 and 859.74 is: 1,186.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,522.90 : 2,101.60 = 859.74 : x
  2. Step 2: Convert to fraction form
    1,522.90/2,101.60 = 859.74/x
  3. Step 3: Cross multiply
    1,522.90x = 2,101.60 × 859.74
  4. Step 4: Simplify right side
    1,522.90x = 1,806,829.58
  5. Step 5: Solve for x
    x = 1,806,829.58/1,522.90
  6. Step 6: Final answer
    x = 1,186.44

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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.