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Finding the Fourth Proportional to 288,991.80, 403,801.20 and 288,991.80

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Solution

The fourth proportional to 288,991.80, 403,801.20 and 288,991.80 is: 403,801.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,991.80 : 403,801.20 = 288,991.80 : x
  2. Step 2: Convert to fraction form
    288,991.80/403,801.20 = 288,991.80/x
  3. Step 3: Cross multiply
    288,991.80x = 403,801.20 × 288,991.80
  4. Step 4: Simplify right side
    288,991.80x = 116,695,235,630.16
  5. Step 5: Solve for x
    x = 116,695,235,630.16/288,991.80
  6. Step 6: Final answer
    x = 403,801.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.