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Finding the Fourth Proportional to 1,248,932.28, 1,723,568.52 and 765,404.21

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Solution

The fourth proportional to 1,248,932.28, 1,723,568.52 and 765,404.21 is: 1,056,283.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248,932.28 : 1,723,568.52 = 765,404.21 : x
  2. Step 2: Convert to fraction form
    1,248,932.28/1,723,568.52 = 765,404.21/x
  3. Step 3: Cross multiply
    1,248,932.28x = 1,723,568.52 × 765,404.21
  4. Step 4: Simplify right side
    1,248,932.28x = 1,319,226,592,813.63
  5. Step 5: Solve for x
    x = 1,319,226,592,813.63/1,248,932.28
  6. Step 6: Final answer
    x = 1,056,283.53

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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.