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Finding the Fourth Proportional to 1,429,326.80, 1,972,474.86 and 784,788.74

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Solution

The fourth proportional to 1,429,326.80, 1,972,474.86 and 784,788.74 is: 1,083,010.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429,326.80 : 1,972,474.86 = 784,788.74 : x
  2. Step 2: Convert to fraction form
    1,429,326.80/1,972,474.86 = 784,788.74/x
  3. Step 3: Cross multiply
    1,429,326.80x = 1,972,474.86 × 784,788.74
  4. Step 4: Simplify right side
    1,429,326.80x = 1,547,976,050,198.70
  5. Step 5: Solve for x
    x = 1,547,976,050,198.70/1,429,326.80
  6. Step 6: Final answer
    x = 1,083,010.59

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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.