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Finding the Fourth Proportional to 305,662.79, 458,346.70 and 128,122.13

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Solution

The fourth proportional to 305,662.79, 458,346.70 and 128,122.13 is: 192,121.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,662.79 : 458,346.70 = 128,122.13 : x
  2. Step 2: Convert to fraction form
    305,662.79/458,346.70 = 128,122.13/x
  3. Step 3: Cross multiply
    305,662.79x = 458,346.70 × 128,122.13
  4. Step 4: Simplify right side
    305,662.79x = 58,724,355,482.47
  5. Step 5: Solve for x
    x = 58,724,355,482.47/305,662.79
  6. Step 6: Final answer
    x = 192,121.37

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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.