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Finding the Fourth Proportional to 288,400.38, 432,650.39 and 128,533.11

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Solution

The fourth proportional to 288,400.38, 432,650.39 and 128,533.11 is: 192,821.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,400.38 : 432,650.39 = 128,533.11 : x
  2. Step 2: Convert to fraction form
    288,400.38/432,650.39 = 128,533.11/x
  3. Step 3: Cross multiply
    288,400.38x = 432,650.39 × 128,533.11
  4. Step 4: Simplify right side
    288,400.38x = 55,609,899,526.75
  5. Step 5: Solve for x
    x = 55,609,899,526.75/288,400.38
  6. Step 6: Final answer
    x = 192,821.87

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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.