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Finding the Fourth Proportional to 279,392.68, 385,561.94 and 152,069.20

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Solution

The fourth proportional to 279,392.68, 385,561.94 and 152,069.20 is: 209,855.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,392.68 : 385,561.94 = 152,069.20 : x
  2. Step 2: Convert to fraction form
    279,392.68/385,561.94 = 152,069.20/x
  3. Step 3: Cross multiply
    279,392.68x = 385,561.94 × 152,069.20
  4. Step 4: Simplify right side
    279,392.68x = 58,632,095,766.25
  5. Step 5: Solve for x
    x = 58,632,095,766.25/279,392.68
  6. Step 6: Final answer
    x = 209,855.52

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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.