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Finding the Fourth Proportional to 398,451.66, 549,856.45 and 217,165.76

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Solution

The fourth proportional to 398,451.66, 549,856.45 and 217,165.76 is: 299,685.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,451.66 : 549,856.45 = 217,165.76 : x
  2. Step 2: Convert to fraction form
    398,451.66/549,856.45 = 217,165.76/x
  3. Step 3: Cross multiply
    398,451.66x = 549,856.45 × 217,165.76
  4. Step 4: Simplify right side
    398,451.66x = 119,409,993,439.29
  5. Step 5: Solve for x
    x = 119,409,993,439.29/398,451.66
  6. Step 6: Final answer
    x = 299,685.02

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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.