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Finding the Fourth Proportional to 640,024.80, 883,241.64 and 353,538.96

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Solution

The fourth proportional to 640,024.80, 883,241.64 and 353,538.96 is: 487,887.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,024.80 : 883,241.64 = 353,538.96 : x
  2. Step 2: Convert to fraction form
    640,024.80/883,241.64 = 353,538.96/x
  3. Step 3: Cross multiply
    640,024.80x = 883,241.64 × 353,538.96
  4. Step 4: Simplify right side
    640,024.80x = 312,260,330,834.29
  5. Step 5: Solve for x
    x = 312,260,330,834.29/640,024.80
  6. Step 6: Final answer
    x = 487,887.86

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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.