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Finding the Fourth Proportional to 1,107.31, 1,528.08 and 609.94

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Solution

The fourth proportional to 1,107.31, 1,528.08 and 609.94 is: 841.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.31 : 1,528.08 = 609.94 : x
  2. Step 2: Convert to fraction form
    1,107.31/1,528.08 = 609.94/x
  3. Step 3: Cross multiply
    1,107.31x = 1,528.08 × 609.94
  4. Step 4: Simplify right side
    1,107.31x = 932,041.31
  5. Step 5: Solve for x
    x = 932,041.31/1,107.31
  6. Step 6: Final answer
    x = 841.71

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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.