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Finding the Fourth Proportional to 398,221.07, 549,538.72 and 216,935.17

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Solution

The fourth proportional to 398,221.07, 549,538.72 and 216,935.17 is: 299,367.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,221.07 : 549,538.72 = 216,935.17 : x
  2. Step 2: Convert to fraction form
    398,221.07/549,538.72 = 216,935.17/x
  3. Step 3: Cross multiply
    398,221.07x = 549,538.72 × 216,935.17
  4. Step 4: Simplify right side
    398,221.07x = 119,214,273,728.60
  5. Step 5: Solve for x
    x = 119,214,273,728.60/398,221.07
  6. Step 6: Final answer
    x = 299,367.07

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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.