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Finding the Fourth Proportional to 613,439.70, 920,159.55 and 313,820.70

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Solution

The fourth proportional to 613,439.70, 920,159.55 and 313,820.70 is: 470,731.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,439.70 : 920,159.55 = 313,820.70 : x
  2. Step 2: Convert to fraction form
    613,439.70/920,159.55 = 313,820.70/x
  3. Step 3: Cross multiply
    613,439.70x = 920,159.55 × 313,820.70
  4. Step 4: Simplify right side
    613,439.70x = 288,765,114,092.69
  5. Step 5: Solve for x
    x = 288,765,114,092.69/613,439.70
  6. Step 6: Final answer
    x = 470,731.05

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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.