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Finding the Fourth Proportional to 644,991.32, 890,065.32 and 354,600.77

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Solution

The fourth proportional to 644,991.32, 890,065.32 and 354,600.77 is: 489,336.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,991.32 : 890,065.32 = 354,600.77 : x
  2. Step 2: Convert to fraction form
    644,991.32/890,065.32 = 354,600.77/x
  3. Step 3: Cross multiply
    644,991.32x = 890,065.32 × 354,600.77
  4. Step 4: Simplify right side
    644,991.32x = 315,617,847,822.30
  5. Step 5: Solve for x
    x = 315,617,847,822.30/644,991.32
  6. Step 6: Final answer
    x = 489,336.58

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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.