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Finding the Fourth Proportional to 261,452.64, 392,247 and 74,478.72

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Solution

The fourth proportional to 261,452.64, 392,247 and 74,478.72 is: 111,737.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,452.64 : 392,247 = 74,478.72 : x
  2. Step 2: Convert to fraction form
    261,452.64/392,247 = 74,478.72/x
  3. Step 3: Cross multiply
    261,452.64x = 392,247 × 74,478.72
  4. Step 4: Simplify right side
    261,452.64x = 29,214,054,483.84
  5. Step 5: Solve for x
    x = 29,214,054,483.84/261,452.64
  6. Step 6: Final answer
    x = 111,737.46

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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.