Home / 645,235.56-890,401.77-354,844.62

Finding the Fourth Proportional to 645,235.56, 890,401.77 and 354,844.62

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Solution

The fourth proportional to 645,235.56, 890,401.77 and 354,844.62 is: 489,672.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,235.56 : 890,401.77 = 354,844.62 : x
  2. Step 2: Convert to fraction form
    645,235.56/890,401.77 = 354,844.62/x
  3. Step 3: Cross multiply
    645,235.56x = 890,401.77 × 354,844.62
  4. Step 4: Simplify right side
    645,235.56x = 315,954,277,722.98
  5. Step 5: Solve for x
    x = 315,954,277,722.98/645,235.56
  6. Step 6: Final answer
    x = 489,672.76

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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.