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Finding the Fourth Proportional to 1,528.54, 2,108.86 and 865.26

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Solution

The fourth proportional to 1,528.54, 2,108.86 and 865.26 is: 1,193.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.54 : 2,108.86 = 865.26 : x
  2. Step 2: Convert to fraction form
    1,528.54/2,108.86 = 865.26/x
  3. Step 3: Cross multiply
    1,528.54x = 2,108.86 × 865.26
  4. Step 4: Simplify right side
    1,528.54x = 1,824,712.20
  5. Step 5: Solve for x
    x = 1,824,712.20/1,528.54
  6. Step 6: Final answer
    x = 1,193.76

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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.