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Finding the Fourth Proportional to 258,279.09, 387,422.53 and 98,363.87

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Solution

The fourth proportional to 258,279.09, 387,422.53 and 98,363.87 is: 147,547.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,279.09 : 387,422.53 = 98,363.87 : x
  2. Step 2: Convert to fraction form
    258,279.09/387,422.53 = 98,363.87/x
  3. Step 3: Cross multiply
    258,279.09x = 387,422.53 × 98,363.87
  4. Step 4: Simplify right side
    258,279.09x = 38,108,379,014.67
  5. Step 5: Solve for x
    x = 38,108,379,014.67/258,279.09
  6. Step 6: Final answer
    x = 147,547.28

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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.