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Finding the Fourth Proportional to 640,955.48, 961,359.78 and 167,686.52

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Solution

The fourth proportional to 640,955.48, 961,359.78 and 167,686.52 is: 251,510.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,955.48 : 961,359.78 = 167,686.52 : x
  2. Step 2: Convert to fraction form
    640,955.48/961,359.78 = 167,686.52/x
  3. Step 3: Cross multiply
    640,955.48x = 961,359.78 × 167,686.52
  4. Step 4: Simplify right side
    640,955.48x = 161,207,075,976.17
  5. Step 5: Solve for x
    x = 161,207,075,976.17/640,955.48
  6. Step 6: Final answer
    x = 251,510.57

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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.