Home / 824,775.96-1,138,136.94-485,178.60

Finding the Fourth Proportional to 824,775.96, 1,138,136.94 and 485,178.60

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Solution

The fourth proportional to 824,775.96, 1,138,136.94 and 485,178.60 is: 669,514.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    824,775.96 : 1,138,136.94 = 485,178.60 : x
  2. Step 2: Convert to fraction form
    824,775.96/1,138,136.94 = 485,178.60/x
  3. Step 3: Cross multiply
    824,775.96x = 1,138,136.94 × 485,178.60
  4. Step 4: Simplify right side
    824,775.96x = 552,199,687,157.48
  5. Step 5: Solve for x
    x = 552,199,687,157.48/824,775.96
  6. Step 6: Final answer
    x = 669,514.77

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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.