Home / 1,278,390.87-1,917,088.16-479,236.50

Finding the Fourth Proportional to 1,278,390.87, 1,917,088.16 and 479,236.50

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Solution

The fourth proportional to 1,278,390.87, 1,917,088.16 and 479,236.50 is: 718,668.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,390.87 : 1,917,088.16 = 479,236.50 : x
  2. Step 2: Convert to fraction form
    1,278,390.87/1,917,088.16 = 479,236.50/x
  3. Step 3: Cross multiply
    1,278,390.87x = 1,917,088.16 × 479,236.50
  4. Step 4: Simplify right side
    1,278,390.87x = 918,738,617,593.66
  5. Step 5: Solve for x
    x = 918,738,617,593.66/1,278,390.87
  6. Step 6: Final answer
    x = 718,668.01

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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.