Home / 645,331.40-890,578.96-354,955.24

Finding the Fourth Proportional to 645,331.40, 890,578.96 and 354,955.24

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Solution

The fourth proportional to 645,331.40, 890,578.96 and 354,955.24 is: 489,850.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,331.40 : 890,578.96 = 354,955.24 : x
  2. Step 2: Convert to fraction form
    645,331.40/890,578.96 = 354,955.24/x
  3. Step 3: Cross multiply
    645,331.40x = 890,578.96 × 354,955.24
  4. Step 4: Simplify right side
    645,331.40x = 316,115,665,371.92
  5. Step 5: Solve for x
    x = 316,115,665,371.92/645,331.40
  6. Step 6: Final answer
    x = 489,850.13

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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.