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Finding the Fourth Proportional to 620,891.26, 856,900.98 and 345,276.61

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Solution

The fourth proportional to 620,891.26, 856,900.98 and 345,276.61 is: 476,521.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,891.26 : 856,900.98 = 345,276.61 : x
  2. Step 2: Convert to fraction form
    620,891.26/856,900.98 = 345,276.61/x
  3. Step 3: Cross multiply
    620,891.26x = 856,900.98 × 345,276.61
  4. Step 4: Simplify right side
    620,891.26x = 295,867,863,337.83
  5. Step 5: Solve for x
    x = 295,867,863,337.83/620,891.26
  6. Step 6: Final answer
    x = 476,521.23

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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.