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Finding the Fourth Proportional to 869,900.72, 1,200,382.34 and 487,853.69

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Solution

The fourth proportional to 869,900.72, 1,200,382.34 and 487,853.69 is: 673,192.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,900.72 : 1,200,382.34 = 487,853.69 : x
  2. Step 2: Convert to fraction form
    869,900.72/1,200,382.34 = 487,853.69/x
  3. Step 3: Cross multiply
    869,900.72x = 1,200,382.34 × 487,853.69
  4. Step 4: Simplify right side
    869,900.72x = 585,610,945,538.65
  5. Step 5: Solve for x
    x = 585,610,945,538.65/869,900.72
  6. Step 6: Final answer
    x = 673,192.85

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1.5x scale

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.