Home / 621,066.40-856,822.80-391,548.16

Finding the Fourth Proportional to 621,066.40, 856,822.80 and 391,548.16

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Solution

The fourth proportional to 621,066.40, 856,822.80 and 391,548.16 is: 540,179.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,066.40 : 856,822.80 = 391,548.16 : x
  2. Step 2: Convert to fraction form
    621,066.40/856,822.80 = 391,548.16/x
  3. Step 3: Cross multiply
    621,066.40x = 856,822.80 × 391,548.16
  4. Step 4: Simplify right side
    621,066.40x = 335,487,390,786.05
  5. Step 5: Solve for x
    x = 335,487,390,786.05/621,066.40
  6. Step 6: Final answer
    x = 540,179.59

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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.