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Finding the Fourth Proportional to 885,771.60, 1,328,657.40 and 487,640.40

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Solution

The fourth proportional to 885,771.60, 1,328,657.40 and 487,640.40 is: 731,460.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,771.60 : 1,328,657.40 = 487,640.40 : x
  2. Step 2: Convert to fraction form
    885,771.60/1,328,657.40 = 487,640.40/x
  3. Step 3: Cross multiply
    885,771.60x = 1,328,657.40 × 487,640.40
  4. Step 4: Simplify right side
    885,771.60x = 647,907,025,998.96
  5. Step 5: Solve for x
    x = 647,907,025,998.96/885,771.60
  6. Step 6: Final answer
    x = 731,460.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.