Home / 1,578,990.69-2,178,875.57-890,624.61

Finding the Fourth Proportional to 1,578,990.69, 2,178,875.57 and 890,624.61

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Solution

The fourth proportional to 1,578,990.69, 2,178,875.57 and 890,624.61 is: 1,228,987.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578,990.69 : 2,178,875.57 = 890,624.61 : x
  2. Step 2: Convert to fraction form
    1,578,990.69/2,178,875.57 = 890,624.61/x
  3. Step 3: Cross multiply
    1,578,990.69x = 2,178,875.57 × 890,624.61
  4. Step 4: Simplify right side
    1,578,990.69x = 1,940,560,200,316.65
  5. Step 5: Solve for x
    x = 1,940,560,200,316.65/1,578,990.69
  6. Step 6: Final answer
    x = 1,228,987.74

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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.