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Finding the Fourth Proportional to 1,248,922.57, 1,723,554.88 and 765,394.29

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Solution

The fourth proportional to 1,248,922.57, 1,723,554.88 and 765,394.29 is: 1,056,269.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248,922.57 : 1,723,554.88 = 765,394.29 : x
  2. Step 2: Convert to fraction form
    1,248,922.57/1,723,554.88 = 765,394.29/x
  3. Step 3: Cross multiply
    1,248,922.57x = 1,723,554.88 × 765,394.29
  4. Step 4: Simplify right side
    1,248,922.57x = 1,319,199,063,653.64
  5. Step 5: Solve for x
    x = 1,319,199,063,653.64/1,248,922.57
  6. Step 6: Final answer
    x = 1,056,269.70

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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.