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Finding the Fourth Proportional to 644,806.20, 967,403.70 and 345,430.20

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Solution

The fourth proportional to 644,806.20, 967,403.70 and 345,430.20 is: 518,249.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,806.20 : 967,403.70 = 345,430.20 : x
  2. Step 2: Convert to fraction form
    644,806.20/967,403.70 = 345,430.20/x
  3. Step 3: Cross multiply
    644,806.20x = 967,403.70 × 345,430.20
  4. Step 4: Simplify right side
    644,806.20x = 334,170,453,571.74
  5. Step 5: Solve for x
    x = 334,170,453,571.74/644,806.20
  6. Step 6: Final answer
    x = 518,249.44

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Double scale
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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.