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Finding the Fourth Proportional to 640,672.59, 961,018.20 and 167,358

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Solution

The fourth proportional to 640,672.59, 961,018.20 and 167,358 is: 251,039.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,672.59 : 961,018.20 = 167,358 : x
  2. Step 2: Convert to fraction form
    640,672.59/961,018.20 = 167,358/x
  3. Step 3: Cross multiply
    640,672.59x = 961,018.20 × 167,358
  4. Step 4: Simplify right side
    640,672.59x = 160,834,083,915.60
  5. Step 5: Solve for x
    x = 160,834,083,915.60/640,672.59
  6. Step 6: Final answer
    x = 251,039.43

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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.