Home / 645,082.94-890,237.30-354,716.60

Finding the Fourth Proportional to 645,082.94, 890,237.30 and 354,716.60

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Solution

The fourth proportional to 645,082.94, 890,237.30 and 354,716.60 is: 489,521.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,082.94 : 890,237.30 = 354,716.60 : x
  2. Step 2: Convert to fraction form
    645,082.94/890,237.30 = 354,716.60/x
  3. Step 3: Cross multiply
    645,082.94x = 890,237.30 × 354,716.60
  4. Step 4: Simplify right side
    645,082.94x = 315,781,942,024.41
  5. Step 5: Solve for x
    x = 315,781,942,024.41/645,082.94
  6. Step 6: Final answer
    x = 489,521.46

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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.