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Finding the Fourth Proportional to 720,249.10, 993,941.71 and 397,956.90

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Solution

The fourth proportional to 720,249.10, 993,941.71 and 397,956.90 is: 549,179.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,249.10 : 993,941.71 = 397,956.90 : x
  2. Step 2: Convert to fraction form
    720,249.10/993,941.71 = 397,956.90/x
  3. Step 3: Cross multiply
    720,249.10x = 993,941.71 × 397,956.90
  4. Step 4: Simplify right side
    720,249.10x = 395,545,964,424.69
  5. Step 5: Solve for x
    x = 395,545,964,424.69/720,249.10
  6. Step 6: Final answer
    x = 549,179.40

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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.