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Finding the Fourth Proportional to 258,486.64, 387,748.48 and 68,946

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Solution

The fourth proportional to 258,486.64, 387,748.48 and 68,946 is: 103,423.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,486.64 : 387,748.48 = 68,946 : x
  2. Step 2: Convert to fraction form
    258,486.64/387,748.48 = 68,946/x
  3. Step 3: Cross multiply
    258,486.64x = 387,748.48 × 68,946
  4. Step 4: Simplify right side
    258,486.64x = 26,733,706,702.08
  5. Step 5: Solve for x
    x = 26,733,706,702.08/258,486.64
  6. Step 6: Final answer
    x = 103,423.94

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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.