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Finding the Fourth Proportional to 399,109.56, 549,513.90 and 338,554.68

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Solution

The fourth proportional to 399,109.56, 549,513.90 and 338,554.68 is: 466,138.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,109.56 : 549,513.90 = 338,554.68 : x
  2. Step 2: Convert to fraction form
    399,109.56/549,513.90 = 338,554.68/x
  3. Step 3: Cross multiply
    399,109.56x = 549,513.90 × 338,554.68
  4. Step 4: Simplify right side
    399,109.56x = 186,040,502,570.05
  5. Step 5: Solve for x
    x = 186,040,502,570.05/399,109.56
  6. Step 6: Final answer
    x = 466,138.93

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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.