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Finding the Fourth Proportional to 640,308.93, 883,626.64 and 353,829.02

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Solution

The fourth proportional to 640,308.93, 883,626.64 and 353,829.02 is: 488,284.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,308.93 : 883,626.64 = 353,829.02 : x
  2. Step 2: Convert to fraction form
    640,308.93/883,626.64 = 353,829.02/x
  3. Step 3: Cross multiply
    640,308.93x = 883,626.64 × 353,829.02
  4. Step 4: Simplify right side
    640,308.93x = 312,652,748,077.09
  5. Step 5: Solve for x
    x = 312,652,748,077.09/640,308.93
  6. Step 6: Final answer
    x = 488,284.22

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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.