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Finding the Fourth Proportional to 640,170.66, 883,425.15 and 349,776

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Solution

The fourth proportional to 640,170.66, 883,425.15 and 349,776 is: 482,685.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,170.66 : 883,425.15 = 349,776 : x
  2. Step 2: Convert to fraction form
    640,170.66/883,425.15 = 349,776/x
  3. Step 3: Cross multiply
    640,170.66x = 883,425.15 × 349,776
  4. Step 4: Simplify right side
    640,170.66x = 309,000,915,266.40
  5. Step 5: Solve for x
    x = 309,000,915,266.40/640,170.66
  6. Step 6: Final answer
    x = 482,685.22

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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.