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Finding the Fourth Proportional to 279,298.48, 385,441.60 and 151,978.96

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Solution

The fourth proportional to 279,298.48, 385,441.60 and 151,978.96 is: 209,736.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,298.48 : 385,441.60 = 151,978.96 : x
  2. Step 2: Convert to fraction form
    279,298.48/385,441.60 = 151,978.96/x
  3. Step 3: Cross multiply
    279,298.48x = 385,441.60 × 151,978.96
  4. Step 4: Simplify right side
    279,298.48x = 58,579,013,508.74
  5. Step 5: Solve for x
    x = 58,579,013,508.74/279,298.48
  6. Step 6: Final answer
    x = 209,736.24

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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.