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Finding the Fourth Proportional to 265,618.63, 398,505.79 and 85,700.44

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Solution

The fourth proportional to 265,618.63, 398,505.79 and 85,700.44 is: 128,575.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,618.63 : 398,505.79 = 85,700.44 : x
  2. Step 2: Convert to fraction form
    265,618.63/398,505.79 = 85,700.44/x
  3. Step 3: Cross multiply
    265,618.63x = 398,505.79 × 85,700.44
  4. Step 4: Simplify right side
    265,618.63x = 34,152,119,553.02
  5. Step 5: Solve for x
    x = 34,152,119,553.02/265,618.63
  6. Step 6: Final answer
    x = 128,575.77

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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.