Home / 621,079.40-857,740.20-427,989.18

Finding the Fourth Proportional to 621,079.40, 857,740.20 and 427,989.18

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Solution

The fourth proportional to 621,079.40, 857,740.20 and 427,989.18 is: 591,073.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,079.40 : 857,740.20 = 427,989.18 : x
  2. Step 2: Convert to fraction form
    621,079.40/857,740.20 = 427,989.18/x
  3. Step 3: Cross multiply
    621,079.40x = 857,740.20 × 427,989.18
  4. Step 4: Simplify right side
    621,079.40x = 367,103,524,851.04
  5. Step 5: Solve for x
    x = 367,103,524,851.04/621,079.40
  6. Step 6: Final answer
    x = 591,073.42

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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.