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Finding the Fourth Proportional to 279,871.90, 386,222.31 and 152,547.49

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Solution

The fourth proportional to 279,871.90, 386,222.31 and 152,547.49 is: 210,515.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,871.90 : 386,222.31 = 152,547.49 : x
  2. Step 2: Convert to fraction form
    279,871.90/386,222.31 = 152,547.49/x
  3. Step 3: Cross multiply
    279,871.90x = 386,222.31 × 152,547.49
  4. Step 4: Simplify right side
    279,871.90x = 58,917,243,972.50
  5. Step 5: Solve for x
    x = 58,917,243,972.50/279,871.90
  6. Step 6: Final answer
    x = 210,515.04

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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.