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Finding the Fourth Proportional to 279,513.52, 385,729.12 and 152,189.62

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Solution

The fourth proportional to 279,513.52, 385,729.12 and 152,189.62 is: 210,021.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,513.52 : 385,729.12 = 152,189.62 : x
  2. Step 2: Convert to fraction form
    279,513.52/385,729.12 = 152,189.62/x
  3. Step 3: Cross multiply
    279,513.52x = 385,729.12 × 152,189.62
  4. Step 4: Simplify right side
    279,513.52x = 58,703,968,195.73
  5. Step 5: Solve for x
    x = 58,703,968,195.73/279,513.52
  6. Step 6: Final answer
    x = 210,021.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.