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Finding the Fourth Proportional to 1,357,693.92, 1,873,409.52 and 784,623.50

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Solution

The fourth proportional to 1,357,693.92, 1,873,409.52 and 784,623.50 is: 1,082,660.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357,693.92 : 1,873,409.52 = 784,623.50 : x
  2. Step 2: Convert to fraction form
    1,357,693.92/1,873,409.52 = 784,623.50/x
  3. Step 3: Cross multiply
    1,357,693.92x = 1,873,409.52 × 784,623.50
  4. Step 4: Simplify right side
    1,357,693.92x = 1,469,921,134,515.72
  5. Step 5: Solve for x
    x = 1,469,921,134,515.72/1,357,693.92
  6. Step 6: Final answer
    x = 1,082,660.17

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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.