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Finding the Fourth Proportional to 338,911.44, 508,328.16 and 89,612.88

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Solution

The fourth proportional to 338,911.44, 508,328.16 and 89,612.88 is: 134,409.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,911.44 : 508,328.16 = 89,612.88 : x
  2. Step 2: Convert to fraction form
    338,911.44/508,328.16 = 89,612.88/x
  3. Step 3: Cross multiply
    338,911.44x = 508,328.16 × 89,612.88
  4. Step 4: Simplify right side
    338,911.44x = 45,552,750,402.70
  5. Step 5: Solve for x
    x = 45,552,750,402.70/338,911.44
  6. Step 6: Final answer
    x = 134,409.01

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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.