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Finding the Fourth Proportional to 398,448.54, 549,855.51 and 217,160.43

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Solution

The fourth proportional to 398,448.54, 549,855.51 and 217,160.43 is: 299,679.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,448.54 : 549,855.51 = 217,160.43 : x
  2. Step 2: Convert to fraction form
    398,448.54/549,855.51 = 217,160.43/x
  3. Step 3: Cross multiply
    398,448.54x = 549,855.51 × 217,160.43
  4. Step 4: Simplify right side
    398,448.54x = 119,406,858,989.47
  5. Step 5: Solve for x
    x = 119,406,858,989.47/398,448.54
  6. Step 6: Final answer
    x = 299,679.50

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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.