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Finding the Fourth Proportional to 288,719.16, 433,078.97 and 78,357.11

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Solution

The fourth proportional to 288,719.16, 433,078.97 and 78,357.11 is: 117,535.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,719.16 : 433,078.97 = 78,357.11 : x
  2. Step 2: Convert to fraction form
    288,719.16/433,078.97 = 78,357.11/x
  3. Step 3: Cross multiply
    288,719.16x = 433,078.97 × 78,357.11
  4. Step 4: Simplify right side
    288,719.16x = 33,934,813,933.80
  5. Step 5: Solve for x
    x = 33,934,813,933.80/288,719.16
  6. Step 6: Final answer
    x = 117,535.72

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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.