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Finding the Fourth Proportional to 265,612.29, 398,652.17 and 139,342.77

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Solution

The fourth proportional to 265,612.29, 398,652.17 and 139,342.77 is: 209,136.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,612.29 : 398,652.17 = 139,342.77 : x
  2. Step 2: Convert to fraction form
    265,612.29/398,652.17 = 139,342.77/x
  3. Step 3: Cross multiply
    265,612.29x = 398,652.17 × 139,342.77
  4. Step 4: Simplify right side
    265,612.29x = 55,549,296,937.60
  5. Step 5: Solve for x
    x = 55,549,296,937.60/265,612.29
  6. Step 6: Final answer
    x = 209,136.77

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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.