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Finding the Fourth Proportional to 218,736,209.80, 328,104,314.70 and 215,334,987.40

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Solution

The fourth proportional to 218,736,209.80, 328,104,314.70 and 215,334,987.40 is: 323,002,481.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,736,209.80 : 328,104,314.70 = 215,334,987.40 : x
  2. Step 2: Convert to fraction form
    218,736,209.80/328,104,314.70 = 215,334,987.40/x
  3. Step 3: Cross multiply
    218,736,209.80x = 328,104,314.70 × 215,334,987.40
  4. Step 4: Simplify right side
    218,736,209.80x = 70,652,338,471,810,136
  5. Step 5: Solve for x
    x = 70,652,338,471,810,136/218,736,209.80
  6. Step 6: Final answer
    x = 323,002,481.10

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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.