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Finding the Fourth Proportional to 279,438, 385,624.49 and 152,114.55

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Solution

The fourth proportional to 279,438, 385,624.49 and 152,114.55 is: 209,918.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,438 : 385,624.49 = 152,114.55 : x
  2. Step 2: Convert to fraction form
    279,438/385,624.49 = 152,114.55/x
  3. Step 3: Cross multiply
    279,438x = 385,624.49 × 152,114.55
  4. Step 4: Simplify right side
    279,438x = 58,659,095,004.76
  5. Step 5: Solve for x
    x = 58,659,095,004.76/279,438
  6. Step 6: Final answer
    x = 209,918.10

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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.