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Finding the Fourth Proportional to 1,325.28, 1,829.77 and 828.62

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Solution

The fourth proportional to 1,325.28, 1,829.77 and 828.62 is: 1,144.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.28 : 1,829.77 = 828.62 : x
  2. Step 2: Convert to fraction form
    1,325.28/1,829.77 = 828.62/x
  3. Step 3: Cross multiply
    1,325.28x = 1,829.77 × 828.62
  4. Step 4: Simplify right side
    1,325.28x = 1,516,184.02
  5. Step 5: Solve for x
    x = 1,516,184.02/1,325.28
  6. Step 6: Final answer
    x = 1,144.05

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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.