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Finding the Fourth Proportional to 279,686.36, 385,953.96 and 158,811.92

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Solution

The fourth proportional to 279,686.36, 385,953.96 and 158,811.92 is: 219,152.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,686.36 : 385,953.96 = 158,811.92 : x
  2. Step 2: Convert to fraction form
    279,686.36/385,953.96 = 158,811.92/x
  3. Step 3: Cross multiply
    279,686.36x = 385,953.96 × 158,811.92
  4. Step 4: Simplify right side
    279,686.36x = 61,294,089,419.20
  5. Step 5: Solve for x
    x = 61,294,089,419.20/279,686.36
  6. Step 6: Final answer
    x = 219,152.94

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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.