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Finding the Fourth Proportional to 991,878.80, 1,487,875.80 and 281,958.80

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Solution

The fourth proportional to 991,878.80, 1,487,875.80 and 281,958.80 is: 422,954.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,878.80 : 1,487,875.80 = 281,958.80 : x
  2. Step 2: Convert to fraction form
    991,878.80/1,487,875.80 = 281,958.80/x
  3. Step 3: Cross multiply
    991,878.80x = 1,487,875.80 × 281,958.80
  4. Step 4: Simplify right side
    991,878.80x = 419,519,675,117.04
  5. Step 5: Solve for x
    x = 419,519,675,117.04/991,878.80
  6. Step 6: Final answer
    x = 422,954.57

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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.