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Finding the Fourth Proportional to 1,528, 2,108.62 and 829.40

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Solution

The fourth proportional to 1,528, 2,108.62 and 829.40 is: 1,144.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528 : 2,108.62 = 829.40 : x
  2. Step 2: Convert to fraction form
    1,528/2,108.62 = 829.40/x
  3. Step 3: Cross multiply
    1,528x = 2,108.62 × 829.40
  4. Step 4: Simplify right side
    1,528x = 1,748,889.43
  5. Step 5: Solve for x
    x = 1,748,889.43/1,528
  6. Step 6: Final answer
    x = 1,144.56

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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.