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Finding the Fourth Proportional to 387,418.48, 534,396.18 and 266,349.58

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Solution

The fourth proportional to 387,418.48, 534,396.18 and 266,349.58 is: 367,396.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,418.48 : 534,396.18 = 266,349.58 : x
  2. Step 2: Convert to fraction form
    387,418.48/534,396.18 = 266,349.58/x
  3. Step 3: Cross multiply
    387,418.48x = 534,396.18 × 266,349.58
  4. Step 4: Simplify right side
    387,418.48x = 142,336,198,096.60
  5. Step 5: Solve for x
    x = 142,336,198,096.60/387,418.48
  6. Step 6: Final answer
    x = 367,396.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.