Home / 814,003.40-1,221,005.10-415,872.20

Finding the Fourth Proportional to 814,003.40, 1,221,005.10 and 415,872.20

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Solution

The fourth proportional to 814,003.40, 1,221,005.10 and 415,872.20 is: 623,808.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,003.40 : 1,221,005.10 = 415,872.20 : x
  2. Step 2: Convert to fraction form
    814,003.40/1,221,005.10 = 415,872.20/x
  3. Step 3: Cross multiply
    814,003.40x = 1,221,005.10 × 415,872.20
  4. Step 4: Simplify right side
    814,003.40x = 507,782,077,148.22
  5. Step 5: Solve for x
    x = 507,782,077,148.22/814,003.40
  6. Step 6: Final answer
    x = 623,808.30

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.