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Finding the Fourth Proportional to 258,271.61, 356,443.67 and 156,353.22

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Solution

The fourth proportional to 258,271.61, 356,443.67 and 156,353.22 is: 215,784.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,271.61 : 356,443.67 = 156,353.22 : x
  2. Step 2: Convert to fraction form
    258,271.61/356,443.67 = 156,353.22/x
  3. Step 3: Cross multiply
    258,271.61x = 356,443.67 × 156,353.22
  4. Step 4: Simplify right side
    258,271.61x = 55,731,115,944.00
  5. Step 5: Solve for x
    x = 55,731,115,944.00/258,271.61
  6. Step 6: Final answer
    x = 215,784.91

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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.