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Finding the Fourth Proportional to 639,386.20, 957,696.90 and 569,344.60

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Solution

The fourth proportional to 639,386.20, 957,696.90 and 569,344.60 is: 852,785.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,386.20 : 957,696.90 = 569,344.60 : x
  2. Step 2: Convert to fraction form
    639,386.20/957,696.90 = 569,344.60/x
  3. Step 3: Cross multiply
    639,386.20x = 957,696.90 × 569,344.60
  4. Step 4: Simplify right side
    639,386.20x = 545,259,558,451.74
  5. Step 5: Solve for x
    x = 545,259,558,451.74/639,386.20
  6. Step 6: Final answer
    x = 852,785.94

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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.