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Finding the Fourth Proportional to 720,123, 993,757.98 and 397,846.68

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Solution

The fourth proportional to 720,123, 993,757.98 and 397,846.68 is: 549,021.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,123 : 993,757.98 = 397,846.68 : x
  2. Step 2: Convert to fraction form
    720,123/993,757.98 = 397,846.68/x
  3. Step 3: Cross multiply
    720,123x = 993,757.98 × 397,846.68
  4. Step 4: Simplify right side
    720,123x = 395,363,313,066.51
  5. Step 5: Solve for x
    x = 395,363,313,066.51/720,123
  6. Step 6: Final answer
    x = 549,021.92

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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.