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Finding the Fourth Proportional to 215,603.20, 323,404.80 and 140,953.60

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Solution

The fourth proportional to 215,603.20, 323,404.80 and 140,953.60 is: 211,430.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,603.20 : 323,404.80 = 140,953.60 : x
  2. Step 2: Convert to fraction form
    215,603.20/323,404.80 = 140,953.60/x
  3. Step 3: Cross multiply
    215,603.20x = 323,404.80 × 140,953.60
  4. Step 4: Simplify right side
    215,603.20x = 45,585,070,817.28
  5. Step 5: Solve for x
    x = 45,585,070,817.28/215,603.20
  6. Step 6: Final answer
    x = 211,430.40

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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.