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Finding the Fourth Proportional to 1,523.40, 2,102.32 and 860.21

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Solution

The fourth proportional to 1,523.40, 2,102.32 and 860.21 is: 1,187.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,523.40 : 2,102.32 = 860.21 : x
  2. Step 2: Convert to fraction form
    1,523.40/2,102.32 = 860.21/x
  3. Step 3: Cross multiply
    1,523.40x = 2,102.32 × 860.21
  4. Step 4: Simplify right side
    1,523.40x = 1,808,429.28
  5. Step 5: Solve for x
    x = 1,808,429.28/1,523.40
  6. Step 6: Final answer
    x = 1,187.10

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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.