Home / 631,181.57-870,766.32-385,980.60

Finding the Fourth Proportional to 631,181.57, 870,766.32 and 385,980.60

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Solution

The fourth proportional to 631,181.57, 870,766.32 and 385,980.60 is: 532,491.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,181.57 : 870,766.32 = 385,980.60 : x
  2. Step 2: Convert to fraction form
    631,181.57/870,766.32 = 385,980.60/x
  3. Step 3: Cross multiply
    631,181.57x = 870,766.32 × 385,980.60
  4. Step 4: Simplify right side
    631,181.57x = 336,098,906,653.39
  5. Step 5: Solve for x
    x = 336,098,906,653.39/631,181.57
  6. Step 6: Final answer
    x = 532,491.64

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Double scale
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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.