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Finding the Fourth Proportional to 215,712.60, 323,568.90 and 203,465.40

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Solution

The fourth proportional to 215,712.60, 323,568.90 and 203,465.40 is: 305,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,712.60 : 323,568.90 = 203,465.40 : x
  2. Step 2: Convert to fraction form
    215,712.60/323,568.90 = 203,465.40/x
  3. Step 3: Cross multiply
    215,712.60x = 323,568.90 × 203,465.40
  4. Step 4: Simplify right side
    215,712.60x = 65,835,075,666.06
  5. Step 5: Solve for x
    x = 65,835,075,666.06/215,712.60
  6. Step 6: Final answer
    x = 305,198.10

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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.