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Finding the Fourth Proportional to 651.04, 898.32 and 388.96

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Solution

The fourth proportional to 651.04, 898.32 and 388.96 is: 536.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.04 : 898.32 = 388.96 : x
  2. Step 2: Convert to fraction form
    651.04/898.32 = 388.96/x
  3. Step 3: Cross multiply
    651.04x = 898.32 × 388.96
  4. Step 4: Simplify right side
    651.04x = 349,410.55
  5. Step 5: Solve for x
    x = 349,410.55/651.04
  6. Step 6: Final answer
    x = 536.70

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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.