Home / 678,987.46-936,612.84-423,895.78

Finding the Fourth Proportional to 678,987.46, 936,612.84 and 423,895.78

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Solution

The fourth proportional to 678,987.46, 936,612.84 and 423,895.78 is: 584,732.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,987.46 : 936,612.84 = 423,895.78 : x
  2. Step 2: Convert to fraction form
    678,987.46/936,612.84 = 423,895.78/x
  3. Step 3: Cross multiply
    678,987.46x = 936,612.84 × 423,895.78
  4. Step 4: Simplify right side
    678,987.46x = 397,026,230,369.82
  5. Step 5: Solve for x
    x = 397,026,230,369.82/678,987.46
  6. Step 6: Final answer
    x = 584,732.79

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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.