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Finding the Fourth Proportional to 353,378.70, 486,431.47 and 307,978.63

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Solution

The fourth proportional to 353,378.70, 486,431.47 and 307,978.63 is: 423,937.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,378.70 : 486,431.47 = 307,978.63 : x
  2. Step 2: Convert to fraction form
    353,378.70/486,431.47 = 307,978.63/x
  3. Step 3: Cross multiply
    353,378.70x = 486,431.47 × 307,978.63
  4. Step 4: Simplify right side
    353,378.70x = 149,810,496,787.63
  5. Step 5: Solve for x
    x = 149,810,496,787.63/353,378.70
  6. Step 6: Final answer
    x = 423,937.54

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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.