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Finding the Fourth Proportional to 640,187.75, 883,494.52 and 353,701.68

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Solution

The fourth proportional to 640,187.75, 883,494.52 and 353,701.68 is: 488,127.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,187.75 : 883,494.52 = 353,701.68 : x
  2. Step 2: Convert to fraction form
    640,187.75/883,494.52 = 353,701.68/x
  3. Step 3: Cross multiply
    640,187.75x = 883,494.52 × 353,701.68
  4. Step 4: Simplify right side
    640,187.75x = 312,493,495,994.79
  5. Step 5: Solve for x
    x = 312,493,495,994.79/640,187.75
  6. Step 6: Final answer
    x = 488,127.89

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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.