Home / 812,358.79-1,121,090.15-449,782.65

Finding the Fourth Proportional to 812,358.79, 1,121,090.15 and 449,782.65

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Solution

The fourth proportional to 812,358.79, 1,121,090.15 and 449,782.65 is: 620,719.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,358.79 : 1,121,090.15 = 449,782.65 : x
  2. Step 2: Convert to fraction form
    812,358.79/1,121,090.15 = 449,782.65/x
  3. Step 3: Cross multiply
    812,358.79x = 1,121,090.15 × 449,782.65
  4. Step 4: Simplify right side
    812,358.79x = 504,246,899,680.35
  5. Step 5: Solve for x
    x = 504,246,899,680.35/812,358.79
  6. Step 6: Final answer
    x = 620,719.45

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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.