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Finding the Fourth Proportional to 621,494.47, 858,144.98 and 485,292.26

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Solution

The fourth proportional to 621,494.47, 858,144.98 and 485,292.26 is: 670,080.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,494.47 : 858,144.98 = 485,292.26 : x
  2. Step 2: Convert to fraction form
    621,494.47/858,144.98 = 485,292.26/x
  3. Step 3: Cross multiply
    621,494.47x = 858,144.98 × 485,292.26
  4. Step 4: Simplify right side
    621,494.47x = 416,451,120,110.45
  5. Step 5: Solve for x
    x = 416,451,120,110.45/621,494.47
  6. Step 6: Final answer
    x = 670,080.17

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1.5x scale

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.