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Finding the Fourth Proportional to 198,643.40, 297,965.10 and 159,277.40

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Solution

The fourth proportional to 198,643.40, 297,965.10 and 159,277.40 is: 238,916.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,643.40 : 297,965.10 = 159,277.40 : x
  2. Step 2: Convert to fraction form
    198,643.40/297,965.10 = 159,277.40/x
  3. Step 3: Cross multiply
    198,643.40x = 297,965.10 × 159,277.40
  4. Step 4: Simplify right side
    198,643.40x = 47,459,106,418.74
  5. Step 5: Solve for x
    x = 47,459,106,418.74/198,643.40
  6. Step 6: Final answer
    x = 238,916.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.