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Finding the Fourth Proportional to 288,514.76, 432,821.95 and 128,647.49

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Solution

The fourth proportional to 288,514.76, 432,821.95 and 128,647.49 is: 192,993.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,514.76 : 432,821.95 = 128,647.49 : x
  2. Step 2: Convert to fraction form
    288,514.76/432,821.95 = 128,647.49/x
  3. Step 3: Cross multiply
    288,514.76x = 432,821.95 × 128,647.49
  4. Step 4: Simplify right side
    288,514.76x = 55,681,454,998.68
  5. Step 5: Solve for x
    x = 55,681,454,998.68/288,514.76
  6. Step 6: Final answer
    x = 192,993.44

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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.