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Finding the Fourth Proportional to 991,990.80, 1,488,043.80 and 282,070.80

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Solution

The fourth proportional to 991,990.80, 1,488,043.80 and 282,070.80 is: 423,122.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,990.80 : 1,488,043.80 = 282,070.80 : x
  2. Step 2: Convert to fraction form
    991,990.80/1,488,043.80 = 282,070.80/x
  3. Step 3: Cross multiply
    991,990.80x = 1,488,043.80 × 282,070.80
  4. Step 4: Simplify right side
    991,990.80x = 419,733,705,101.04
  5. Step 5: Solve for x
    x = 419,733,705,101.04/991,990.80
  6. Step 6: Final answer
    x = 423,122.58

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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.