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Finding the Fourth Proportional to 343,480.20, 515,220.30 and 305,426.40

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Solution

The fourth proportional to 343,480.20, 515,220.30 and 305,426.40 is: 458,139.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,480.20 : 515,220.30 = 305,426.40 : x
  2. Step 2: Convert to fraction form
    343,480.20/515,220.30 = 305,426.40/x
  3. Step 3: Cross multiply
    343,480.20x = 515,220.30 × 305,426.40
  4. Step 4: Simplify right side
    343,480.20x = 157,361,881,435.92
  5. Step 5: Solve for x
    x = 157,361,881,435.92/343,480.20
  6. Step 6: Final answer
    x = 458,139.60

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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.