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Finding the Fourth Proportional to 258,411.32, 356,579.08 and 155,040.03

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Solution

The fourth proportional to 258,411.32, 356,579.08 and 155,040.03 is: 213,938.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,411.32 : 356,579.08 = 155,040.03 : x
  2. Step 2: Convert to fraction form
    258,411.32/356,579.08 = 155,040.03/x
  3. Step 3: Cross multiply
    258,411.32x = 356,579.08 × 155,040.03
  4. Step 4: Simplify right side
    258,411.32x = 55,284,032,152.02
  5. Step 5: Solve for x
    x = 55,284,032,152.02/258,411.32
  6. Step 6: Final answer
    x = 213,938.12

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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.