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Finding the Fourth Proportional to 640,346.47, 883,602.87 and 353,849.47

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Solution

The fourth proportional to 640,346.47, 883,602.87 and 353,849.47 is: 488,270.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,346.47 : 883,602.87 = 353,849.47 : x
  2. Step 2: Convert to fraction form
    640,346.47/883,602.87 = 353,849.47/x
  3. Step 3: Cross multiply
    640,346.47x = 883,602.87 × 353,849.47
  4. Step 4: Simplify right side
    640,346.47x = 312,662,407,239.98
  5. Step 5: Solve for x
    x = 312,662,407,239.98/640,346.47
  6. Step 6: Final answer
    x = 488,270.68

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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.