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Finding the Fourth Proportional to 265,527.02, 398,278.74 and 85,608.38

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Solution

The fourth proportional to 265,527.02, 398,278.74 and 85,608.38 is: 128,408.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,527.02 : 398,278.74 = 85,608.38 : x
  2. Step 2: Convert to fraction form
    265,527.02/398,278.74 = 85,608.38/x
  3. Step 3: Cross multiply
    265,527.02x = 398,278.74 × 85,608.38
  4. Step 4: Simplify right side
    265,527.02x = 34,095,997,719.84
  5. Step 5: Solve for x
    x = 34,095,997,719.84/265,527.02
  6. Step 6: Final answer
    x = 128,408.77

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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.