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Finding the Fourth Proportional to 407,319.89, 611,009.81 and 107,798.45

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Solution

The fourth proportional to 407,319.89, 611,009.81 and 107,798.45 is: 161,705.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,319.89 : 611,009.81 = 107,798.45 : x
  2. Step 2: Convert to fraction form
    407,319.89/611,009.81 = 107,798.45/x
  3. Step 3: Cross multiply
    407,319.89x = 611,009.81 × 107,798.45
  4. Step 4: Simplify right side
    407,319.89x = 65,865,907,869.36
  5. Step 5: Solve for x
    x = 65,865,907,869.36/407,319.89
  6. Step 6: Final answer
    x = 161,705.60

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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.