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Finding the Fourth Proportional to 407,618.20, 611,513.70 and 123,285.40

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Solution

The fourth proportional to 407,618.20, 611,513.70 and 123,285.40 is: 184,954.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,618.20 : 611,513.70 = 123,285.40 : x
  2. Step 2: Convert to fraction form
    407,618.20/611,513.70 = 123,285.40/x
  3. Step 3: Cross multiply
    407,618.20x = 611,513.70 × 123,285.40
  4. Step 4: Simplify right side
    407,618.20x = 75,390,711,109.98
  5. Step 5: Solve for x
    x = 75,390,711,109.98/407,618.20
  6. Step 6: Final answer
    x = 184,954.23

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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.