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Finding the Fourth Proportional to 640,913.84, 961,374 and 167,600.24

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Solution

The fourth proportional to 640,913.84, 961,374 and 167,600.24 is: 251,401.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,913.84 : 961,374 = 167,600.24 : x
  2. Step 2: Convert to fraction form
    640,913.84/961,374 = 167,600.24/x
  3. Step 3: Cross multiply
    640,913.84x = 961,374 × 167,600.24
  4. Step 4: Simplify right side
    640,913.84x = 161,126,513,129.76
  5. Step 5: Solve for x
    x = 161,126,513,129.76/640,913.84
  6. Step 6: Final answer
    x = 251,401.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.