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Finding the Fourth Proportional to 309,604.72, 464,397.36 and 87,988.72

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Solution

The fourth proportional to 309,604.72, 464,397.36 and 87,988.72 is: 131,980.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,604.72 : 464,397.36 = 87,988.72 : x
  2. Step 2: Convert to fraction form
    309,604.72/464,397.36 = 87,988.72/x
  3. Step 3: Cross multiply
    309,604.72x = 464,397.36 × 87,988.72
  4. Step 4: Simplify right side
    309,604.72x = 40,861,729,277.78
  5. Step 5: Solve for x
    x = 40,861,729,277.78/309,604.72
  6. Step 6: Final answer
    x = 131,980.32

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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.