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Finding the Fourth Proportional to 528,392.49, 729,185.76 and 310,542.66

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Solution

The fourth proportional to 528,392.49, 729,185.76 and 310,542.66 is: 428,551.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,392.49 : 729,185.76 = 310,542.66 : x
  2. Step 2: Convert to fraction form
    528,392.49/729,185.76 = 310,542.66/x
  3. Step 3: Cross multiply
    528,392.49x = 729,185.76 × 310,542.66
  4. Step 4: Simplify right side
    528,392.49x = 226,443,285,544.52
  5. Step 5: Solve for x
    x = 226,443,285,544.52/528,392.49
  6. Step 6: Final answer
    x = 428,551.29

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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.