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Finding the Fourth Proportional to 640,172.94, 883,363.35 and 353,675.94

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Solution

The fourth proportional to 640,172.94, 883,363.35 and 353,675.94 is: 488,031.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,172.94 : 883,363.35 = 353,675.94 : x
  2. Step 2: Convert to fraction form
    640,172.94/883,363.35 = 353,675.94/x
  3. Step 3: Cross multiply
    640,172.94x = 883,363.35 × 353,675.94
  4. Step 4: Simplify right side
    640,172.94x = 312,424,363,172.80
  5. Step 5: Solve for x
    x = 312,424,363,172.80/640,172.94
  6. Step 6: Final answer
    x = 488,031.19

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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.