Home / 814,421.22-1,220,905.91-309,336.90

Finding the Fourth Proportional to 814,421.22, 1,220,905.91 and 309,336.90

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Solution

The fourth proportional to 814,421.22, 1,220,905.91 and 309,336.90 is: 463,729.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,421.22 : 1,220,905.91 = 309,336.90 : x
  2. Step 2: Convert to fraction form
    814,421.22/1,220,905.91 = 309,336.90/x
  3. Step 3: Cross multiply
    814,421.22x = 1,220,905.91 × 309,336.90
  4. Step 4: Simplify right side
    814,421.22x = 377,671,249,019.82
  5. Step 5: Solve for x
    x = 377,671,249,019.82/814,421.22
  6. Step 6: Final answer
    x = 463,729.62

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Double scale
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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.