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Finding the Fourth Proportional to 279,783.16, 386,100.46 and 152,458.72

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Solution

The fourth proportional to 279,783.16, 386,100.46 and 152,458.72 is: 210,392.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,783.16 : 386,100.46 = 152,458.72 : x
  2. Step 2: Convert to fraction form
    279,783.16/386,100.46 = 152,458.72/x
  3. Step 3: Cross multiply
    279,783.16x = 386,100.46 × 152,458.72
  4. Step 4: Simplify right side
    279,783.16x = 58,864,381,923.01
  5. Step 5: Solve for x
    x = 58,864,381,923.01/279,783.16
  6. Step 6: Final answer
    x = 210,392.87

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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.