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Finding the Fourth Proportional to 664,297.55, 916,414.88 and 392,183.16

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Solution

The fourth proportional to 664,297.55, 916,414.88 and 392,183.16 is: 541,026.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,297.55 : 916,414.88 = 392,183.16 : x
  2. Step 2: Convert to fraction form
    664,297.55/916,414.88 = 392,183.16/x
  3. Step 3: Cross multiply
    664,297.55x = 916,414.88 × 392,183.16
  4. Step 4: Simplify right side
    664,297.55x = 359,402,483,509.42
  5. Step 5: Solve for x
    x = 359,402,483,509.42/664,297.55
  6. Step 6: Final answer
    x = 541,026.36

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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.