Home / 621,010.80-856,983.24-391,521.60

Finding the Fourth Proportional to 621,010.80, 856,983.24 and 391,521.60

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Solution

The fourth proportional to 621,010.80, 856,983.24 and 391,521.60 is: 540,292.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,010.80 : 856,983.24 = 391,521.60 : x
  2. Step 2: Convert to fraction form
    621,010.80/856,983.24 = 391,521.60/x
  3. Step 3: Cross multiply
    621,010.80x = 856,983.24 × 391,521.60
  4. Step 4: Simplify right side
    621,010.80x = 335,527,449,297.98
  5. Step 5: Solve for x
    x = 335,527,449,297.98/621,010.80
  6. Step 6: Final answer
    x = 540,292.45

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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.