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Finding the Fourth Proportional to 387,285.70, 580,928.99 and 121,047.62

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Solution

The fourth proportional to 387,285.70, 580,928.99 and 121,047.62 is: 181,571.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,285.70 : 580,928.99 = 121,047.62 : x
  2. Step 2: Convert to fraction form
    387,285.70/580,928.99 = 121,047.62/x
  3. Step 3: Cross multiply
    387,285.70x = 580,928.99 × 121,047.62
  4. Step 4: Simplify right side
    387,285.70x = 70,320,071,628.50
  5. Step 5: Solve for x
    x = 70,320,071,628.50/387,285.70
  6. Step 6: Final answer
    x = 181,571.57

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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.