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Finding the Fourth Proportional to 215,290,421.80, 322,935,632.70 and 215,290,421.80

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Solution

The fourth proportional to 215,290,421.80, 322,935,632.70 and 215,290,421.80 is: 322,935,632.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,290,421.80 : 322,935,632.70 = 215,290,421.80 : x
  2. Step 2: Convert to fraction form
    215,290,421.80/322,935,632.70 = 215,290,421.80/x
  3. Step 3: Cross multiply
    215,290,421.80x = 322,935,632.70 × 215,290,421.80
  4. Step 4: Simplify right side
    215,290,421.80x = 69,524,948,578,232,872
  5. Step 5: Solve for x
    x = 69,524,948,578,232,872/215,290,421.80
  6. Step 6: Final answer
    x = 322,935,632.70

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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.