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Finding the Fourth Proportional to 279,513.51, 385,729.55 and 152,189.88

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Solution

The fourth proportional to 279,513.51, 385,729.55 and 152,189.88 is: 210,022.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,513.51 : 385,729.55 = 152,189.88 : x
  2. Step 2: Convert to fraction form
    279,513.51/385,729.55 = 152,189.88/x
  3. Step 3: Cross multiply
    279,513.51x = 385,729.55 × 152,189.88
  4. Step 4: Simplify right side
    279,513.51x = 58,704,133,926.95
  5. Step 5: Solve for x
    x = 58,704,133,926.95/279,513.51
  6. Step 6: Final answer
    x = 210,022.53

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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.