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Finding the Fourth Proportional to 664,078.94, 916,314.49 and 373,650.20

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Solution

The fourth proportional to 664,078.94, 916,314.49 and 373,650.20 is: 515,572.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,078.94 : 916,314.49 = 373,650.20 : x
  2. Step 2: Convert to fraction form
    664,078.94/916,314.49 = 373,650.20/x
  3. Step 3: Cross multiply
    664,078.94x = 916,314.49 × 373,650.20
  4. Step 4: Simplify right side
    664,078.94x = 342,381,092,451.40
  5. Step 5: Solve for x
    x = 342,381,092,451.40/664,078.94
  6. Step 6: Final answer
    x = 515,572.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.