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Finding the Fourth Proportional to 398,259.78, 549,643.32 and 245,268.06

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Solution

The fourth proportional to 398,259.78, 549,643.32 and 245,268.06 is: 338,497.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,259.78 : 549,643.32 = 245,268.06 : x
  2. Step 2: Convert to fraction form
    398,259.78/549,643.32 = 245,268.06/x
  3. Step 3: Cross multiply
    398,259.78x = 549,643.32 × 245,268.06
  4. Step 4: Simplify right side
    398,259.78x = 134,809,950,788.36
  5. Step 5: Solve for x
    x = 134,809,950,788.36/398,259.78
  6. Step 6: Final answer
    x = 338,497.53

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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.