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Finding the Fourth Proportional to 398,521.24, 549,950.52 and 217,226.20

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Solution

The fourth proportional to 398,521.24, 549,950.52 and 217,226.20 is: 299,767.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,521.24 : 549,950.52 = 217,226.20 : x
  2. Step 2: Convert to fraction form
    398,521.24/549,950.52 = 217,226.20/x
  3. Step 3: Cross multiply
    398,521.24x = 549,950.52 × 217,226.20
  4. Step 4: Simplify right side
    398,521.24x = 119,463,661,647.62
  5. Step 5: Solve for x
    x = 119,463,661,647.62/398,521.24
  6. Step 6: Final answer
    x = 299,767.36

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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.