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Finding the Fourth Proportional to 651.02, 898.41 and 388.98

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Solution

The fourth proportional to 651.02, 898.41 and 388.98 is: 536.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.02 : 898.41 = 388.98 : x
  2. Step 2: Convert to fraction form
    651.02/898.41 = 388.98/x
  3. Step 3: Cross multiply
    651.02x = 898.41 × 388.98
  4. Step 4: Simplify right side
    651.02x = 349,463.52
  5. Step 5: Solve for x
    x = 349,463.52/651.02
  6. Step 6: Final answer
    x = 536.80

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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.