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Finding the Fourth Proportional to 398,399.21, 549,791.02 and 217,111.19

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Solution

The fourth proportional to 398,399.21, 549,791.02 and 217,111.19 is: 299,613.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,399.21 : 549,791.02 = 217,111.19 : x
  2. Step 2: Convert to fraction form
    398,399.21/549,791.02 = 217,111.19/x
  3. Step 3: Cross multiply
    398,399.21x = 549,791.02 × 217,111.19
  4. Step 4: Simplify right side
    398,399.21x = 119,365,782,603.51
  5. Step 5: Solve for x
    x = 119,365,782,603.51/398,399.21
  6. Step 6: Final answer
    x = 299,613.50

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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.