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Finding the Fourth Proportional to 613,403.80, 920,105.70 and 347,683.30

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Solution

The fourth proportional to 613,403.80, 920,105.70 and 347,683.30 is: 521,524.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,403.80 : 920,105.70 = 347,683.30 : x
  2. Step 2: Convert to fraction form
    613,403.80/920,105.70 = 347,683.30/x
  3. Step 3: Cross multiply
    613,403.80x = 920,105.70 × 347,683.30
  4. Step 4: Simplify right side
    613,403.80x = 319,905,386,124.81
  5. Step 5: Solve for x
    x = 319,905,386,124.81/613,403.80
  6. Step 6: Final answer
    x = 521,524.95

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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.