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Finding the Fourth Proportional to 279,306.75, 385,440.08 and 151,980.15

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Solution

The fourth proportional to 279,306.75, 385,440.08 and 151,980.15 is: 209,730.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,306.75 : 385,440.08 = 151,980.15 : x
  2. Step 2: Convert to fraction form
    279,306.75/385,440.08 = 151,980.15/x
  3. Step 3: Cross multiply
    279,306.75x = 385,440.08 × 151,980.15
  4. Step 4: Simplify right side
    279,306.75x = 58,579,240,414.51
  5. Step 5: Solve for x
    x = 58,579,240,414.51/279,306.75
  6. Step 6: Final answer
    x = 209,730.84

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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.