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Finding the Fourth Proportional to 312,289.40, 468,364.03 and 143,647.76

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Solution

The fourth proportional to 312,289.40, 468,364.03 and 143,647.76 is: 215,439.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,289.40 : 468,364.03 = 143,647.76 : x
  2. Step 2: Convert to fraction form
    312,289.40/468,364.03 = 143,647.76/x
  3. Step 3: Cross multiply
    312,289.40x = 468,364.03 × 143,647.76
  4. Step 4: Simplify right side
    312,289.40x = 67,279,444,585.86
  5. Step 5: Solve for x
    x = 67,279,444,585.86/312,289.40
  6. Step 6: Final answer
    x = 215,439.41

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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.