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Finding the Fourth Proportional to 1,248,934.07, 1,723,570.76 and 765,405.79

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Solution

The fourth proportional to 1,248,934.07, 1,723,570.76 and 765,405.79 is: 1,056,285.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248,934.07 : 1,723,570.76 = 765,405.79 : x
  2. Step 2: Convert to fraction form
    1,248,934.07/1,723,570.76 = 765,405.79/x
  3. Step 3: Cross multiply
    1,248,934.07x = 1,723,570.76 × 765,405.79
  4. Step 4: Simplify right side
    1,248,934.07x = 1,319,231,036,783.29
  5. Step 5: Solve for x
    x = 1,319,231,036,783.29/1,248,934.07
  6. Step 6: Final answer
    x = 1,056,285.57

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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.