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Finding the Fourth Proportional to 398,681.66, 549,733.75 and 325,858.61

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Solution

The fourth proportional to 398,681.66, 549,733.75 and 325,858.61 is: 449,319.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,681.66 : 549,733.75 = 325,858.61 : x
  2. Step 2: Convert to fraction form
    398,681.66/549,733.75 = 325,858.61/x
  3. Step 3: Cross multiply
    398,681.66x = 549,733.75 × 325,858.61
  4. Step 4: Simplify right side
    398,681.66x = 179,135,475,645.09
  5. Step 5: Solve for x
    x = 179,135,475,645.09/398,681.66
  6. Step 6: Final answer
    x = 449,319.58

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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.