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Finding the Fourth Proportional to 216,419.40, 324,629.10 and 127,715.40

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Solution

The fourth proportional to 216,419.40, 324,629.10 and 127,715.40 is: 191,573.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,419.40 : 324,629.10 = 127,715.40 : x
  2. Step 2: Convert to fraction form
    216,419.40/324,629.10 = 127,715.40/x
  3. Step 3: Cross multiply
    216,419.40x = 324,629.10 × 127,715.40
  4. Step 4: Simplify right side
    216,419.40x = 41,460,135,358.14
  5. Step 5: Solve for x
    x = 41,460,135,358.14/216,419.40
  6. Step 6: Final answer
    x = 191,573.10

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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.