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Finding the Fourth Proportional to 640,955.98, 961,360.53 and 167,687.02

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Solution

The fourth proportional to 640,955.98, 961,360.53 and 167,687.02 is: 251,511.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,955.98 : 961,360.53 = 167,687.02 : x
  2. Step 2: Convert to fraction form
    640,955.98/961,360.53 = 167,687.02/x
  3. Step 3: Cross multiply
    640,955.98x = 961,360.53 × 167,687.02
  4. Step 4: Simplify right side
    640,955.98x = 161,207,682,421.32
  5. Step 5: Solve for x
    x = 161,207,682,421.32/640,955.98
  6. Step 6: Final answer
    x = 251,511.32

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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.