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Finding the Fourth Proportional to 265,632.78, 398,566.95 and 139,242.86

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Solution

The fourth proportional to 265,632.78, 398,566.95 and 139,242.86 is: 208,926.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,632.78 : 398,566.95 = 139,242.86 : x
  2. Step 2: Convert to fraction form
    265,632.78/398,566.95 = 139,242.86/x
  3. Step 3: Cross multiply
    265,632.78x = 398,566.95 × 139,242.86
  4. Step 4: Simplify right side
    265,632.78x = 55,497,600,999.11
  5. Step 5: Solve for x
    x = 55,497,600,999.11/265,632.78
  6. Step 6: Final answer
    x = 208,926.02

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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.