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Finding the Fourth Proportional to 217,894.40, 326,404.20 and 124,290.80

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Solution

The fourth proportional to 217,894.40, 326,404.20 and 124,290.80 is: 186,186.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,894.40 : 326,404.20 = 124,290.80 : x
  2. Step 2: Convert to fraction form
    217,894.40/326,404.20 = 124,290.80/x
  3. Step 3: Cross multiply
    217,894.40x = 326,404.20 × 124,290.80
  4. Step 4: Simplify right side
    217,894.40x = 40,569,039,141.36
  5. Step 5: Solve for x
    x = 40,569,039,141.36/217,894.40
  6. Step 6: Final answer
    x = 186,186.70

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1.5x scale

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.