Home / 486,919.20-731,607.60-309,511.20

Finding the Fourth Proportional to 486,919.20, 731,607.60 and 309,511.20

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Solution

The fourth proportional to 486,919.20, 731,607.60 and 309,511.20 is: 465,047.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,919.20 : 731,607.60 = 309,511.20 : x
  2. Step 2: Convert to fraction form
    486,919.20/731,607.60 = 309,511.20/x
  3. Step 3: Cross multiply
    486,919.20x = 731,607.60 × 309,511.20
  4. Step 4: Simplify right side
    486,919.20x = 226,440,746,205.12
  5. Step 5: Solve for x
    x = 226,440,746,205.12/486,919.20
  6. Step 6: Final answer
    x = 465,047.89

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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.