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Finding the Fourth Proportional to 918,634.92, 1,377,978.30 and 253,786.92

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Solution

The fourth proportional to 918,634.92, 1,377,978.30 and 253,786.92 is: 380,687.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,634.92 : 1,377,978.30 = 253,786.92 : x
  2. Step 2: Convert to fraction form
    918,634.92/1,377,978.30 = 253,786.92/x
  3. Step 3: Cross multiply
    918,634.92x = 1,377,978.30 × 253,786.92
  4. Step 4: Simplify right side
    918,634.92x = 349,712,868,583.84
  5. Step 5: Solve for x
    x = 349,712,868,583.84/918,634.92
  6. Step 6: Final answer
    x = 380,687.54

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1.5x scale

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.