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Finding the Fourth Proportional to 242,647.20, 363,970.80 and 191,908.80

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Solution

The fourth proportional to 242,647.20, 363,970.80 and 191,908.80 is: 287,863.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,647.20 : 363,970.80 = 191,908.80 : x
  2. Step 2: Convert to fraction form
    242,647.20/363,970.80 = 191,908.80/x
  3. Step 3: Cross multiply
    242,647.20x = 363,970.80 × 191,908.80
  4. Step 4: Simplify right side
    242,647.20x = 69,849,199,463.04
  5. Step 5: Solve for x
    x = 69,849,199,463.04/242,647.20
  6. Step 6: Final answer
    x = 287,863.20

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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.