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Finding the Fourth Proportional to 279,605.28, 385,859.69 and 152,280.78

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Solution

The fourth proportional to 279,605.28, 385,859.69 and 152,280.78 is: 210,149.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,605.28 : 385,859.69 = 152,280.78 : x
  2. Step 2: Convert to fraction form
    279,605.28/385,859.69 = 152,280.78/x
  3. Step 3: Cross multiply
    279,605.28x = 385,859.69 × 152,280.78
  4. Step 4: Simplify right side
    279,605.28x = 58,759,014,563.76
  5. Step 5: Solve for x
    x = 58,759,014,563.76/279,605.28
  6. Step 6: Final answer
    x = 210,149.87

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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.