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Finding the Fourth Proportional to 265,615.15, 398,540.06 and 139,225.15

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Solution

The fourth proportional to 265,615.15, 398,540.06 and 139,225.15 is: 208,899.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,615.15 : 398,540.06 = 139,225.15 : x
  2. Step 2: Convert to fraction form
    265,615.15/398,540.06 = 139,225.15/x
  3. Step 3: Cross multiply
    265,615.15x = 398,540.06 × 139,225.15
  4. Step 4: Simplify right side
    265,615.15x = 55,486,799,634.51
  5. Step 5: Solve for x
    x = 55,486,799,634.51/265,615.15
  6. Step 6: Final answer
    x = 208,899.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.