Home / 783,120.05-1,172,055.68-688,641.65

Finding the Fourth Proportional to 783,120.05, 1,172,055.68 and 688,641.65

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Solution

The fourth proportional to 783,120.05, 1,172,055.68 and 688,641.65 is: 1,030,654.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,120.05 : 1,172,055.68 = 688,641.65 : x
  2. Step 2: Convert to fraction form
    783,120.05/1,172,055.68 = 688,641.65/x
  3. Step 3: Cross multiply
    783,120.05x = 1,172,055.68 × 688,641.65
  4. Step 4: Simplify right side
    783,120.05x = 807,126,353,923.86
  5. Step 5: Solve for x
    x = 807,126,353,923.86/783,120.05
  6. Step 6: Final answer
    x = 1,030,654.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.