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Finding the Fourth Proportional to 640,764.99, 884,188.04 and 354,238.83

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Solution

The fourth proportional to 640,764.99, 884,188.04 and 354,238.83 is: 488,812.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,764.99 : 884,188.04 = 354,238.83 : x
  2. Step 2: Convert to fraction form
    640,764.99/884,188.04 = 354,238.83/x
  3. Step 3: Cross multiply
    640,764.99x = 884,188.04 × 354,238.83
  4. Step 4: Simplify right side
    640,764.99x = 313,213,735,018.40
  5. Step 5: Solve for x
    x = 313,213,735,018.40/640,764.99
  6. Step 6: Final answer
    x = 488,812.19

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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.