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Finding the Fourth Proportional to 279,800.74, 386,123.74 and 152,476.30

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Solution

The fourth proportional to 279,800.74, 386,123.74 and 152,476.30 is: 210,416.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,800.74 : 386,123.74 = 152,476.30 : x
  2. Step 2: Convert to fraction form
    279,800.74/386,123.74 = 152,476.30/x
  3. Step 3: Cross multiply
    279,800.74x = 386,123.74 × 152,476.30
  4. Step 4: Simplify right side
    279,800.74x = 58,874,719,217.36
  5. Step 5: Solve for x
    x = 58,874,719,217.36/279,800.74
  6. Step 6: Final answer
    x = 210,416.60

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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.