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Finding the Fourth Proportional to 547,407.36, 755,393.28 and 308,928

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Solution

The fourth proportional to 547,407.36, 755,393.28 and 308,928 is: 426,304.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,407.36 : 755,393.28 = 308,928 : x
  2. Step 2: Convert to fraction form
    547,407.36/755,393.28 = 308,928/x
  3. Step 3: Cross multiply
    547,407.36x = 755,393.28 × 308,928
  4. Step 4: Simplify right side
    547,407.36x = 233,362,135,203.84
  5. Step 5: Solve for x
    x = 233,362,135,203.84/547,407.36
  6. Step 6: Final answer
    x = 426,304.34

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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.