Home / 645,029.83-890,063.89-354,593.50

Finding the Fourth Proportional to 645,029.83, 890,063.89 and 354,593.50

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Solution

The fourth proportional to 645,029.83, 890,063.89 and 354,593.50 is: 489,296.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,029.83 : 890,063.89 = 354,593.50 : x
  2. Step 2: Convert to fraction form
    645,029.83/890,063.89 = 354,593.50/x
  3. Step 3: Cross multiply
    645,029.83x = 890,063.89 × 354,593.50
  4. Step 4: Simplify right side
    645,029.83x = 315,610,868,861.66
  5. Step 5: Solve for x
    x = 315,610,868,861.66/645,029.83
  6. Step 6: Final answer
    x = 489,296.55

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Double scale
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Similar ratio
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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.