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Finding the Fourth Proportional to 279,378.48, 385,542.30 and 152,055

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Solution

The fourth proportional to 279,378.48, 385,542.30 and 152,055 is: 209,835.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,378.48 : 385,542.30 = 152,055 : x
  2. Step 2: Convert to fraction form
    279,378.48/385,542.30 = 152,055/x
  3. Step 3: Cross multiply
    279,378.48x = 385,542.30 × 152,055
  4. Step 4: Simplify right side
    279,378.48x = 58,623,634,426.50
  5. Step 5: Solve for x
    x = 58,623,634,426.50/279,378.48
  6. Step 6: Final answer
    x = 209,835.90

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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.