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Finding the Fourth Proportional to 254,961.76, 382,486.40 and 77,486.72

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Solution

The fourth proportional to 254,961.76, 382,486.40 and 77,486.72 is: 116,243.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,961.76 : 382,486.40 = 77,486.72 : x
  2. Step 2: Convert to fraction form
    254,961.76/382,486.40 = 77,486.72/x
  3. Step 3: Cross multiply
    254,961.76x = 382,486.40 × 77,486.72
  4. Step 4: Simplify right side
    254,961.76x = 29,637,616,580.61
  5. Step 5: Solve for x
    x = 29,637,616,580.61/254,961.76
  6. Step 6: Final answer
    x = 116,243.38

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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.