Home / 852,458.40-1,279,724.40-640,432.80

Finding the Fourth Proportional to 852,458.40, 1,279,724.40 and 640,432.80

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Solution

The fourth proportional to 852,458.40, 1,279,724.40 and 640,432.80 is: 961,428.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    852,458.40 : 1,279,724.40 = 640,432.80 : x
  2. Step 2: Convert to fraction form
    852,458.40/1,279,724.40 = 640,432.80/x
  3. Step 3: Cross multiply
    852,458.40x = 1,279,724.40 × 640,432.80
  4. Step 4: Simplify right side
    852,458.40x = 819,577,480,720.32
  5. Step 5: Solve for x
    x = 819,577,480,720.32/852,458.40
  6. Step 6: Final answer
    x = 961,428.12

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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.