Home / 1,387,028.18-1,913,558.15-870,480.65

Finding the Fourth Proportional to 1,387,028.18, 1,913,558.15 and 870,480.65

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Solution

The fourth proportional to 1,387,028.18, 1,913,558.15 and 870,480.65 is: 1,200,923.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,028.18 : 1,913,558.15 = 870,480.65 : x
  2. Step 2: Convert to fraction form
    1,387,028.18/1,913,558.15 = 870,480.65/x
  3. Step 3: Cross multiply
    1,387,028.18x = 1,913,558.15 × 870,480.65
  4. Step 4: Simplify right side
    1,387,028.18x = 1,665,715,337,872.39
  5. Step 5: Solve for x
    x = 1,665,715,337,872.39/1,387,028.18
  6. Step 6: Final answer
    x = 1,200,923.93

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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.