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Finding the Fourth Proportional to 279,722.98, 386,017.74 and 152,398.57

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Solution

The fourth proportional to 279,722.98, 386,017.74 and 152,398.57 is: 210,310.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,722.98 : 386,017.74 = 152,398.57 : x
  2. Step 2: Convert to fraction form
    279,722.98/386,017.74 = 152,398.57/x
  3. Step 3: Cross multiply
    279,722.98x = 386,017.74 × 152,398.57
  4. Step 4: Simplify right side
    279,722.98x = 58,828,551,570.63
  5. Step 5: Solve for x
    x = 58,828,551,570.63/279,722.98
  6. Step 6: Final answer
    x = 210,310.04

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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.