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Finding the Fourth Proportional to 398,416.95, 549,799.34 and 217,124.98

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Solution

The fourth proportional to 398,416.95, 549,799.34 and 217,124.98 is: 299,623.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,416.95 : 549,799.34 = 217,124.98 : x
  2. Step 2: Convert to fraction form
    398,416.95/549,799.34 = 217,124.98/x
  3. Step 3: Cross multiply
    398,416.95x = 549,799.34 × 217,124.98
  4. Step 4: Simplify right side
    398,416.95x = 119,375,168,241.39
  5. Step 5: Solve for x
    x = 119,375,168,241.39/398,416.95
  6. Step 6: Final answer
    x = 299,623.72

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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.