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Finding the Fourth Proportional to 662,431.20, 993,812.40 and 213,194.40

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Solution

The fourth proportional to 662,431.20, 993,812.40 and 213,194.40 is: 319,844.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,431.20 : 993,812.40 = 213,194.40 : x
  2. Step 2: Convert to fraction form
    662,431.20/993,812.40 = 213,194.40/x
  3. Step 3: Cross multiply
    662,431.20x = 993,812.40 × 213,194.40
  4. Step 4: Simplify right side
    662,431.20x = 211,875,238,330.56
  5. Step 5: Solve for x
    x = 211,875,238,330.56/662,431.20
  6. Step 6: Final answer
    x = 319,844.90

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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.