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Finding the Fourth Proportional to 312,515.40, 467,972.40 and 216,319.32

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Solution

The fourth proportional to 312,515.40, 467,972.40 and 216,319.32 is: 323,924.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,515.40 : 467,972.40 = 216,319.32 : x
  2. Step 2: Convert to fraction form
    312,515.40/467,972.40 = 216,319.32/x
  3. Step 3: Cross multiply
    312,515.40x = 467,972.40 × 216,319.32
  4. Step 4: Simplify right side
    312,515.40x = 101,231,471,346.77
  5. Step 5: Solve for x
    x = 101,231,471,346.77/312,515.40
  6. Step 6: Final answer
    x = 323,924.75

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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.