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Finding the Fourth Proportional to 1,432,470.72, 1,976,810.62 and 787,939.95

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Solution

The fourth proportional to 1,432,470.72, 1,976,810.62 and 787,939.95 is: 1,087,357.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432,470.72 : 1,976,810.62 = 787,939.95 : x
  2. Step 2: Convert to fraction form
    1,432,470.72/1,976,810.62 = 787,939.95/x
  3. Step 3: Cross multiply
    1,432,470.72x = 1,976,810.62 × 787,939.95
  4. Step 4: Simplify right side
    1,432,470.72x = 1,557,608,068,002.85
  5. Step 5: Solve for x
    x = 1,557,608,068,002.85/1,432,470.72
  6. Step 6: Final answer
    x = 1,087,357.70

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.