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Finding the Fourth Proportional to 279,734.40, 386,037.90 and 152,409.96

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Solution

The fourth proportional to 279,734.40, 386,037.90 and 152,409.96 is: 210,328.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,734.40 : 386,037.90 = 152,409.96 : x
  2. Step 2: Convert to fraction form
    279,734.40/386,037.90 = 152,409.96/x
  3. Step 3: Cross multiply
    279,734.40x = 386,037.90 × 152,409.96
  4. Step 4: Simplify right side
    279,734.40x = 58,836,020,897.48
  5. Step 5: Solve for x
    x = 58,836,020,897.48/279,734.40
  6. Step 6: Final answer
    x = 210,328.16

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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.