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Finding the Fourth Proportional to 279,811.06, 386,128.02 and 152,483.92

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Solution

The fourth proportional to 279,811.06, 386,128.02 and 152,483.92 is: 210,421.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,811.06 : 386,128.02 = 152,483.92 : x
  2. Step 2: Convert to fraction form
    279,811.06/386,128.02 = 152,483.92/x
  3. Step 3: Cross multiply
    279,811.06x = 386,128.02 × 152,483.92
  4. Step 4: Simplify right side
    279,811.06x = 58,878,314,111.44
  5. Step 5: Solve for x
    x = 58,878,314,111.44/279,811.06
  6. Step 6: Final answer
    x = 210,421.68

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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.