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Finding the Fourth Proportional to 640,549.35, 883,920.11 and 354,052.35

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Solution

The fourth proportional to 640,549.35, 883,920.11 and 354,052.35 is: 488,571.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,549.35 : 883,920.11 = 354,052.35 : x
  2. Step 2: Convert to fraction form
    640,549.35/883,920.11 = 354,052.35/x
  3. Step 3: Cross multiply
    640,549.35x = 883,920.11 × 354,052.35
  4. Step 4: Simplify right side
    640,549.35x = 312,953,990,387.50
  5. Step 5: Solve for x
    x = 312,953,990,387.50/640,549.35
  6. Step 6: Final answer
    x = 488,571.24

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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.