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Finding the Fourth Proportional to 343,391.40, 515,135.70 and 106,709.40

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Solution

The fourth proportional to 343,391.40, 515,135.70 and 106,709.40 is: 160,079.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,391.40 : 515,135.70 = 106,709.40 : x
  2. Step 2: Convert to fraction form
    343,391.40/515,135.70 = 106,709.40/x
  3. Step 3: Cross multiply
    343,391.40x = 515,135.70 × 106,709.40
  4. Step 4: Simplify right side
    343,391.40x = 54,969,821,465.58
  5. Step 5: Solve for x
    x = 54,969,821,465.58/343,391.40
  6. Step 6: Final answer
    x = 160,079.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.