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Finding the Fourth Proportional to 398,398.53, 549,773.97 and 217,106.60

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Solution

The fourth proportional to 398,398.53, 549,773.97 and 217,106.60 is: 299,598.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,398.53 : 549,773.97 = 217,106.60 : x
  2. Step 2: Convert to fraction form
    398,398.53/549,773.97 = 217,106.60/x
  3. Step 3: Cross multiply
    398,398.53x = 549,773.97 × 217,106.60
  4. Step 4: Simplify right side
    398,398.53x = 119,359,554,646.33
  5. Step 5: Solve for x
    x = 119,359,554,646.33/398,398.53
  6. Step 6: Final answer
    x = 299,598.38

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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.