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Finding the Fourth Proportional to 407,997.20, 611,995.80 and 108,477.20

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Solution

The fourth proportional to 407,997.20, 611,995.80 and 108,477.20 is: 162,715.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,997.20 : 611,995.80 = 108,477.20 : x
  2. Step 2: Convert to fraction form
    407,997.20/611,995.80 = 108,477.20/x
  3. Step 3: Cross multiply
    407,997.20x = 611,995.80 × 108,477.20
  4. Step 4: Simplify right side
    407,997.20x = 66,387,590,795.76
  5. Step 5: Solve for x
    x = 66,387,590,795.76/407,997.20
  6. Step 6: Final answer
    x = 162,715.80

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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.