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Finding the Fourth Proportional to 720,241.60, 993,953.46 and 397,972.57

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Solution

The fourth proportional to 720,241.60, 993,953.46 and 397,972.57 is: 549,213.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,241.60 : 993,953.46 = 397,972.57 : x
  2. Step 2: Convert to fraction form
    720,241.60/993,953.46 = 397,972.57/x
  3. Step 3: Cross multiply
    720,241.60x = 993,953.46 × 397,972.57
  4. Step 4: Simplify right side
    720,241.60x = 395,566,207,654.39
  5. Step 5: Solve for x
    x = 395,566,207,654.39/720,241.60
  6. Step 6: Final answer
    x = 549,213.22

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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.