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Finding the Fourth Proportional to 279,811.20, 386,128.20 and 152,484.06

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Solution

The fourth proportional to 279,811.20, 386,128.20 and 152,484.06 is: 210,421.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,811.20 : 386,128.20 = 152,484.06 : x
  2. Step 2: Convert to fraction form
    279,811.20/386,128.20 = 152,484.06/x
  3. Step 3: Cross multiply
    279,811.20x = 386,128.20 × 152,484.06
  4. Step 4: Simplify right side
    279,811.20x = 58,878,395,616.49
  5. Step 5: Solve for x
    x = 58,878,395,616.49/279,811.20
  6. Step 6: Final answer
    x = 210,421.87

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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.