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Finding the Fourth Proportional to 478,960.54, 661,009.90 and 275,038.18

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Solution

The fourth proportional to 478,960.54, 661,009.90 and 275,038.18 is: 379,578.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,960.54 : 661,009.90 = 275,038.18 : x
  2. Step 2: Convert to fraction form
    478,960.54/661,009.90 = 275,038.18/x
  3. Step 3: Cross multiply
    478,960.54x = 661,009.90 × 275,038.18
  4. Step 4: Simplify right side
    478,960.54x = 181,802,959,857.98
  5. Step 5: Solve for x
    x = 181,802,959,857.98/478,960.54
  6. Step 6: Final answer
    x = 379,578.16

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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.