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Finding the Fourth Proportional to 621,750.90, 858,016.20 and 353,478.90

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Solution

The fourth proportional to 621,750.90, 858,016.20 and 353,478.90 is: 487,800.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,750.90 : 858,016.20 = 353,478.90 : x
  2. Step 2: Convert to fraction form
    621,750.90/858,016.20 = 353,478.90/x
  3. Step 3: Cross multiply
    621,750.90x = 858,016.20 × 353,478.90
  4. Step 4: Simplify right side
    621,750.90x = 303,290,622,558.18
  5. Step 5: Solve for x
    x = 303,290,622,558.18/621,750.90
  6. Step 6: Final answer
    x = 487,800.86

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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.