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Finding the Fourth Proportional to 614,218.40, 921,910.80 and 378,022.40

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Solution

The fourth proportional to 614,218.40, 921,910.80 and 378,022.40 is: 567,392.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,218.40 : 921,910.80 = 378,022.40 : x
  2. Step 2: Convert to fraction form
    614,218.40/921,910.80 = 378,022.40/x
  3. Step 3: Cross multiply
    614,218.40x = 921,910.80 × 378,022.40
  4. Step 4: Simplify right side
    614,218.40x = 348,502,933,201.92
  5. Step 5: Solve for x
    x = 348,502,933,201.92/614,218.40
  6. Step 6: Final answer
    x = 567,392.53

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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.