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Finding the Fourth Proportional to 478,955.54, 661,002.99 and 275,033.18

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Solution

The fourth proportional to 478,955.54, 661,002.99 and 275,033.18 is: 379,571.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,955.54 : 661,002.99 = 275,033.18 : x
  2. Step 2: Convert to fraction form
    478,955.54/661,002.99 = 275,033.18/x
  3. Step 3: Cross multiply
    478,955.54x = 661,002.99 × 275,033.18
  4. Step 4: Simplify right side
    478,955.54x = 181,797,754,329.21
  5. Step 5: Solve for x
    x = 181,797,754,329.21/478,955.54
  6. Step 6: Final answer
    x = 379,571.25

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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.