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Finding the Fourth Proportional to 331,254.76, 457,415.74 and 320,542.90

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Solution

The fourth proportional to 331,254.76, 457,415.74 and 320,542.90 is: 442,624.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,254.76 : 457,415.74 = 320,542.90 : x
  2. Step 2: Convert to fraction form
    331,254.76/457,415.74 = 320,542.90/x
  3. Step 3: Cross multiply
    331,254.76x = 457,415.74 × 320,542.90
  4. Step 4: Simplify right side
    331,254.76x = 146,621,363,915.45
  5. Step 5: Solve for x
    x = 146,621,363,915.45/331,254.76
  6. Step 6: Final answer
    x = 442,624.18

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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.