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Finding the Fourth Proportional to 681,547.71, 940,696.20 and 423,619.50

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Solution

The fourth proportional to 681,547.71, 940,696.20 and 423,619.50 is: 584,694.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,547.71 : 940,696.20 = 423,619.50 : x
  2. Step 2: Convert to fraction form
    681,547.71/940,696.20 = 423,619.50/x
  3. Step 3: Cross multiply
    681,547.71x = 940,696.20 × 423,619.50
  4. Step 4: Simplify right side
    681,547.71x = 398,497,253,895.90
  5. Step 5: Solve for x
    x = 398,497,253,895.90/681,547.71
  6. Step 6: Final answer
    x = 584,694.58

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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.