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Finding the Fourth Proportional to 470,258.73, 648,872.78 and 279,319.05

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Solution

The fourth proportional to 470,258.73, 648,872.78 and 279,319.05 is: 385,410.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,258.73 : 648,872.78 = 279,319.05 : x
  2. Step 2: Convert to fraction form
    470,258.73/648,872.78 = 279,319.05/x
  3. Step 3: Cross multiply
    470,258.73x = 648,872.78 × 279,319.05
  4. Step 4: Simplify right side
    470,258.73x = 181,242,527,083.86
  5. Step 5: Solve for x
    x = 181,242,527,083.86/470,258.73
  6. Step 6: Final answer
    x = 385,410.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.