Home / 484,128.85-667,639.20-309,754.18

Finding the Fourth Proportional to 484,128.85, 667,639.20 and 309,754.18

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Solution

The fourth proportional to 484,128.85, 667,639.20 and 309,754.18 is: 427,167.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,128.85 : 667,639.20 = 309,754.18 : x
  2. Step 2: Convert to fraction form
    484,128.85/667,639.20 = 309,754.18/x
  3. Step 3: Cross multiply
    484,128.85x = 667,639.20 × 309,754.18
  4. Step 4: Simplify right side
    484,128.85x = 206,804,032,931.86
  5. Step 5: Solve for x
    x = 206,804,032,931.86/484,128.85
  6. Step 6: Final answer
    x = 427,167.34

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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.