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Finding the Fourth Proportional to 279,138.16, 385,206.42 and 151,810.84

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Solution

The fourth proportional to 279,138.16, 385,206.42 and 151,810.84 is: 209,496.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,138.16 : 385,206.42 = 151,810.84 : x
  2. Step 2: Convert to fraction form
    279,138.16/385,206.42 = 151,810.84/x
  3. Step 3: Cross multiply
    279,138.16x = 385,206.42 × 151,810.84
  4. Step 4: Simplify right side
    279,138.16x = 58,478,510,193.59
  5. Step 5: Solve for x
    x = 58,478,510,193.59/279,138.16
  6. Step 6: Final answer
    x = 209,496.65

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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.