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Finding the Fourth Proportional to 613,646.20, 920,906.70 and 347,123.80

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Solution

The fourth proportional to 613,646.20, 920,906.70 and 347,123.80 is: 520,933.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,646.20 : 920,906.70 = 347,123.80 : x
  2. Step 2: Convert to fraction form
    613,646.20/920,906.70 = 347,123.80/x
  3. Step 3: Cross multiply
    613,646.20x = 920,906.70 × 347,123.80
  4. Step 4: Simplify right side
    613,646.20x = 319,668,633,149.46
  5. Step 5: Solve for x
    x = 319,668,633,149.46/613,646.20
  6. Step 6: Final answer
    x = 520,933.13

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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.