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Finding the Fourth Proportional to 386,501.21, 579,754.91 and 158,738.15

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Solution

The fourth proportional to 386,501.21, 579,754.91 and 158,738.15 is: 238,108.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,501.21 : 579,754.91 = 158,738.15 : x
  2. Step 2: Convert to fraction form
    386,501.21/579,754.91 = 158,738.15/x
  3. Step 3: Cross multiply
    386,501.21x = 579,754.91 × 158,738.15
  4. Step 4: Simplify right side
    386,501.21x = 92,029,218,174.35
  5. Step 5: Solve for x
    x = 92,029,218,174.35/386,501.21
  6. Step 6: Final answer
    x = 238,108.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.