Home / 1,528.22-2,108.81-865.10

Finding the Fourth Proportional to 1,528.22, 2,108.81 and 865.10

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Solution

The fourth proportional to 1,528.22, 2,108.81 and 865.10 is: 1,193.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.22 : 2,108.81 = 865.10 : x
  2. Step 2: Convert to fraction form
    1,528.22/2,108.81 = 865.10/x
  3. Step 3: Cross multiply
    1,528.22x = 2,108.81 × 865.10
  4. Step 4: Simplify right side
    1,528.22x = 1,824,316.66
  5. Step 5: Solve for x
    x = 1,824,316.66/1,528.22
  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.