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Finding the Fourth Proportional to 279,307.50, 385,441.11 and 151,980.90

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Solution

The fourth proportional to 279,307.50, 385,441.11 and 151,980.90 is: 209,731.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,307.50 : 385,441.11 = 151,980.90 : x
  2. Step 2: Convert to fraction form
    279,307.50/385,441.11 = 151,980.90/x
  3. Step 3: Cross multiply
    279,307.50x = 385,441.11 × 151,980.90
  4. Step 4: Simplify right side
    279,307.50x = 58,579,686,794.80
  5. Step 5: Solve for x
    x = 58,579,686,794.80/279,307.50
  6. Step 6: Final answer
    x = 209,731.88

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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.