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Finding the Fourth Proportional to 640,112.91, 883,373.70 and 353,651.46

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Solution

The fourth proportional to 640,112.91, 883,373.70 and 353,651.46 is: 488,048.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,112.91 : 883,373.70 = 353,651.46 : x
  2. Step 2: Convert to fraction form
    640,112.91/883,373.70 = 353,651.46/x
  3. Step 3: Cross multiply
    640,112.91x = 883,373.70 × 353,651.46
  4. Step 4: Simplify right side
    640,112.91x = 312,406,398,730.60
  5. Step 5: Solve for x
    x = 312,406,398,730.60/640,112.91
  6. Step 6: Final answer
    x = 488,048.90

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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.