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Finding the Fourth Proportional to 720,445.89, 994,216.92 and 393,764.13

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Solution

The fourth proportional to 720,445.89, 994,216.92 and 393,764.13 is: 543,395.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,445.89 : 994,216.92 = 393,764.13 : x
  2. Step 2: Convert to fraction form
    720,445.89/994,216.92 = 393,764.13/x
  3. Step 3: Cross multiply
    720,445.89x = 994,216.92 × 393,764.13
  4. Step 4: Simplify right side
    720,445.89x = 391,486,960,535.08
  5. Step 5: Solve for x
    x = 391,486,960,535.08/720,445.89
  6. Step 6: Final answer
    x = 543,395.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.