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Finding the Fourth Proportional to 288,087.80, 402,389.80 and 288,087.80

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Solution

The fourth proportional to 288,087.80, 402,389.80 and 288,087.80 is: 402,389.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,087.80 : 402,389.80 = 288,087.80 : x
  2. Step 2: Convert to fraction form
    288,087.80/402,389.80 = 288,087.80/x
  3. Step 3: Cross multiply
    288,087.80x = 402,389.80 × 288,087.80
  4. Step 4: Simplify right side
    288,087.80x = 115,923,592,224.44
  5. Step 5: Solve for x
    x = 115,923,592,224.44/288,087.80
  6. Step 6: Final answer
    x = 402,389.80

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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.