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Finding the Fourth Proportional to 279,814.94, 386,133.34 and 152,487.80

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Solution

The fourth proportional to 279,814.94, 386,133.34 and 152,487.80 is: 210,427.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,814.94 : 386,133.34 = 152,487.80 : x
  2. Step 2: Convert to fraction form
    279,814.94/386,133.34 = 152,487.80/x
  3. Step 3: Cross multiply
    279,814.94x = 386,133.34 × 152,487.80
  4. Step 4: Simplify right side
    279,814.94x = 58,880,623,523.25
  5. Step 5: Solve for x
    x = 58,880,623,523.25/279,814.94
  6. Step 6: Final answer
    x = 210,427.02

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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.