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Finding the Fourth Proportional to 279,870.71, 386,220.66 and 152,546.31

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Solution

The fourth proportional to 279,870.71, 386,220.66 and 152,546.31 is: 210,513.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,870.71 : 386,220.66 = 152,546.31 : x
  2. Step 2: Convert to fraction form
    279,870.71/386,220.66 = 152,546.31/x
  3. Step 3: Cross multiply
    279,870.71x = 386,220.66 × 152,546.31
  4. Step 4: Simplify right side
    279,870.71x = 58,916,536,528.76
  5. Step 5: Solve for x
    x = 58,916,536,528.76/279,870.71
  6. Step 6: Final answer
    x = 210,513.41

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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.