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Finding the Fourth Proportional to 343,890.30, 515,835.45 and 330,112.20

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Solution

The fourth proportional to 343,890.30, 515,835.45 and 330,112.20 is: 495,168.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,890.30 : 515,835.45 = 330,112.20 : x
  2. Step 2: Convert to fraction form
    343,890.30/515,835.45 = 330,112.20/x
  3. Step 3: Cross multiply
    343,890.30x = 515,835.45 × 330,112.20
  4. Step 4: Simplify right side
    343,890.30x = 170,283,575,237.49
  5. Step 5: Solve for x
    x = 170,283,575,237.49/343,890.30
  6. Step 6: Final answer
    x = 495,168.30

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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.