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Finding the Fourth Proportional to 398,343.35, 549,706.72 and 217,056.85

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Solution

The fourth proportional to 398,343.35, 549,706.72 and 217,056.85 is: 299,534.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,343.35 : 549,706.72 = 217,056.85 : x
  2. Step 2: Convert to fraction form
    398,343.35/549,706.72 = 217,056.85/x
  3. Step 3: Cross multiply
    398,343.35x = 549,706.72 × 217,056.85
  4. Step 4: Simplify right side
    398,343.35x = 119,317,609,067.03
  5. Step 5: Solve for x
    x = 119,317,609,067.03/398,343.35
  6. Step 6: Final answer
    x = 299,534.58

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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.