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Finding the Fourth Proportional to 309,600, 464,478.03 and 87,984

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Solution

The fourth proportional to 309,600, 464,478.03 and 87,984 is: 131,998.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,600 : 464,478.03 = 87,984 : x
  2. Step 2: Convert to fraction form
    309,600/464,478.03 = 87,984/x
  3. Step 3: Cross multiply
    309,600x = 464,478.03 × 87,984
  4. Step 4: Simplify right side
    309,600x = 40,866,634,991.52
  5. Step 5: Solve for x
    x = 40,866,634,991.52/309,600
  6. Step 6: Final answer
    x = 131,998.18

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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.