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Finding the Fourth Proportional to 398,393.51, 549,769.07 and 217,101.74

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Solution

The fourth proportional to 398,393.51, 549,769.07 and 217,101.74 is: 299,592.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,393.51 : 549,769.07 = 217,101.74 : x
  2. Step 2: Convert to fraction form
    398,393.51/549,769.07 = 217,101.74/x
  3. Step 3: Cross multiply
    398,393.51x = 549,769.07 × 217,101.74
  4. Step 4: Simplify right side
    398,393.51x = 119,355,819,489.09
  5. Step 5: Solve for x
    x = 119,355,819,489.09/398,393.51
  6. Step 6: Final answer
    x = 299,592.78

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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.