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Finding the Fourth Proportional to 640,671.87, 884,089.21 and 354,174.87

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Solution

The fourth proportional to 640,671.87, 884,089.21 and 354,174.87 is: 488,740.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,671.87 : 884,089.21 = 354,174.87 : x
  2. Step 2: Convert to fraction form
    640,671.87/884,089.21 = 354,174.87/x
  3. Step 3: Cross multiply
    640,671.87x = 884,089.21 × 354,174.87
  4. Step 4: Simplify right side
    640,671.87x = 313,122,181,020.15
  5. Step 5: Solve for x
    x = 313,122,181,020.15/640,671.87
  6. Step 6: Final answer
    x = 488,740.33

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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.