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Finding the Fourth Proportional to 291,799.80, 437,699.70 and 287,863.20

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Solution

The fourth proportional to 291,799.80, 437,699.70 and 287,863.20 is: 431,794.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,799.80 : 437,699.70 = 287,863.20 : x
  2. Step 2: Convert to fraction form
    291,799.80/437,699.70 = 287,863.20/x
  3. Step 3: Cross multiply
    291,799.80x = 437,699.70 × 287,863.20
  4. Step 4: Simplify right side
    291,799.80x = 125,997,636,281.04
  5. Step 5: Solve for x
    x = 125,997,636,281.04/291,799.80
  6. Step 6: Final answer
    x = 431,794.80

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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.