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Finding the Fourth Proportional to 418,436.84, 577,505.97 and 255,188.07

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Solution

The fourth proportional to 418,436.84, 577,505.97 and 255,188.07 is: 352,198.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,436.84 : 577,505.97 = 255,188.07 : x
  2. Step 2: Convert to fraction form
    418,436.84/577,505.97 = 255,188.07/x
  3. Step 3: Cross multiply
    418,436.84x = 577,505.97 × 255,188.07
  4. Step 4: Simplify right side
    418,436.84x = 147,372,633,897.78
  5. Step 5: Solve for x
    x = 147,372,633,897.78/418,436.84
  6. Step 6: Final answer
    x = 352,198.04

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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.