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Finding the Fourth Proportional to 261,010, 391,515 and 64,018

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Solution

The fourth proportional to 261,010, 391,515 and 64,018 is: 96,027

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,010 : 391,515 = 64,018 : x
  2. Step 2: Convert to fraction form
    261,010/391,515 = 64,018/x
  3. Step 3: Cross multiply
    261,010x = 391,515 × 64,018
  4. Step 4: Simplify right side
    261,010x = 25,064,007,270
  5. Step 5: Solve for x
    x = 25,064,007,270/261,010
  6. Step 6: Final answer
    x = 96,027

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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.