Home / 918,976.23-1,378,464.95-287,939.25

Finding the Fourth Proportional to 918,976.23, 1,378,464.95 and 287,939.25

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Solution

The fourth proportional to 918,976.23, 1,378,464.95 and 287,939.25 is: 431,909.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,976.23 : 1,378,464.95 = 287,939.25 : x
  2. Step 2: Convert to fraction form
    918,976.23/1,378,464.95 = 287,939.25/x
  3. Step 3: Cross multiply
    918,976.23x = 1,378,464.95 × 287,939.25
  4. Step 4: Simplify right side
    918,976.23x = 396,914,164,574.14
  5. Step 5: Solve for x
    x = 396,914,164,574.14/918,976.23
  6. Step 6: Final answer
    x = 431,909.07

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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.