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Finding the Fourth Proportional to 458,361.63, 686,748.65 and 248,143.95

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Solution

The fourth proportional to 458,361.63, 686,748.65 and 248,143.95 is: 371,786.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,361.63 : 686,748.65 = 248,143.95 : x
  2. Step 2: Convert to fraction form
    458,361.63/686,748.65 = 248,143.95/x
  3. Step 3: Cross multiply
    458,361.63x = 686,748.65 × 248,143.95
  4. Step 4: Simplify right side
    458,361.63x = 170,412,521,427.45
  5. Step 5: Solve for x
    x = 170,412,521,427.45/458,361.63
  6. Step 6: Final answer
    x = 371,786.18

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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.