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Finding the Fourth Proportional to 613,420.70, 920,159.85 and 192,710.30

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Solution

The fourth proportional to 613,420.70, 920,159.85 and 192,710.30 is: 289,074.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,420.70 : 920,159.85 = 192,710.30 : x
  2. Step 2: Convert to fraction form
    613,420.70/920,159.85 = 192,710.30/x
  3. Step 3: Cross multiply
    613,420.70x = 920,159.85 × 192,710.30
  4. Step 4: Simplify right side
    613,420.70x = 177,324,280,741.46
  5. Step 5: Solve for x
    x = 177,324,280,741.46/613,420.70
  6. Step 6: Final answer
    x = 289,074.50

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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.