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Finding the Fourth Proportional to 288,401.38, 432,651.89 and 128,534.11

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Solution

The fourth proportional to 288,401.38, 432,651.89 and 128,534.11 is: 192,823.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,401.38 : 432,651.89 = 128,534.11 : x
  2. Step 2: Convert to fraction form
    288,401.38/432,651.89 = 128,534.11/x
  3. Step 3: Cross multiply
    288,401.38x = 432,651.89 × 128,534.11
  4. Step 4: Simplify right side
    288,401.38x = 55,610,525,620.97
  5. Step 5: Solve for x
    x = 55,610,525,620.97/288,401.38
  6. Step 6: Final answer
    x = 192,823.37

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1.5x scale

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.