Home / 645,025.61-890,057.99-354,589.29

Finding the Fourth Proportional to 645,025.61, 890,057.99 and 354,589.29

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Solution

The fourth proportional to 645,025.61, 890,057.99 and 354,589.29 is: 489,290.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,025.61 : 890,057.99 = 354,589.29 : x
  2. Step 2: Convert to fraction form
    645,025.61/890,057.99 = 354,589.29/x
  3. Step 3: Cross multiply
    645,025.61x = 890,057.99 × 354,589.29
  4. Step 4: Simplify right side
    645,025.61x = 315,605,031,619.40
  5. Step 5: Solve for x
    x = 315,605,031,619.40/645,025.61
  6. Step 6: Final answer
    x = 489,290.70

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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.