Home / 217,819.40-326,729.10-211,987.40

Finding the Fourth Proportional to 217,819.40, 326,729.10 and 211,987.40

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Solution

The fourth proportional to 217,819.40, 326,729.10 and 211,987.40 is: 317,981.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,819.40 : 326,729.10 = 211,987.40 : x
  2. Step 2: Convert to fraction form
    217,819.40/326,729.10 = 211,987.40/x
  3. Step 3: Cross multiply
    217,819.40x = 326,729.10 × 211,987.40
  4. Step 4: Simplify right side
    217,819.40x = 69,262,452,413.34
  5. Step 5: Solve for x
    x = 69,262,452,413.34/217,819.40
  6. Step 6: Final answer
    x = 317,981.10

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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.