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Finding the Fourth Proportional to 215,255.12, 322,931.82 and 65,516.63

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Solution

The fourth proportional to 215,255.12, 322,931.82 and 65,516.63 is: 98,289.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,255.12 : 322,931.82 = 65,516.63 : x
  2. Step 2: Convert to fraction form
    215,255.12/322,931.82 = 65,516.63/x
  3. Step 3: Cross multiply
    215,255.12x = 322,931.82 × 65,516.63
  4. Step 4: Simplify right side
    215,255.12x = 21,157,404,566.17
  5. Step 5: Solve for x
    x = 21,157,404,566.17/215,255.12
  6. Step 6: Final answer
    x = 98,289.90

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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.