Home / 714,128.28-985,496.58-391,840.44

Finding the Fourth Proportional to 714,128.28, 985,496.58 and 391,840.44

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Solution

The fourth proportional to 714,128.28, 985,496.58 and 391,840.44 is: 540,739.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,128.28 : 985,496.58 = 391,840.44 : x
  2. Step 2: Convert to fraction form
    714,128.28/985,496.58 = 391,840.44/x
  3. Step 3: Cross multiply
    714,128.28x = 985,496.58 × 391,840.44
  4. Step 4: Simplify right side
    714,128.28x = 386,157,413,525.70
  5. Step 5: Solve for x
    x = 386,157,413,525.70/714,128.28
  6. Step 6: Final answer
    x = 540,739.56

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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.