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Finding the Fourth Proportional to 870,878.96, 1,201,812.10 and 488,906.44

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Solution

The fourth proportional to 870,878.96, 1,201,812.10 and 488,906.44 is: 674,690.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,878.96 : 1,201,812.10 = 488,906.44 : x
  2. Step 2: Convert to fraction form
    870,878.96/1,201,812.10 = 488,906.44/x
  3. Step 3: Cross multiply
    870,878.96x = 1,201,812.10 × 488,906.44
  4. Step 4: Simplify right side
    870,878.96x = 587,573,675,359.92
  5. Step 5: Solve for x
    x = 587,573,675,359.92/870,878.96
  6. Step 6: Final answer
    x = 674,690.40

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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.