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Finding the Fourth Proportional to 407,960.40, 611,794.80 and 141,729.60

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Solution

The fourth proportional to 407,960.40, 611,794.80 and 141,729.60 is: 212,543.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,960.40 : 611,794.80 = 141,729.60 : x
  2. Step 2: Convert to fraction form
    407,960.40/611,794.80 = 141,729.60/x
  3. Step 3: Cross multiply
    407,960.40x = 611,794.80 × 141,729.60
  4. Step 4: Simplify right side
    407,960.40x = 86,709,432,286.08
  5. Step 5: Solve for x
    x = 86,709,432,286.08/407,960.40
  6. Step 6: Final answer
    x = 212,543.75

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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.