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Finding the Fourth Proportional to 651.17, 898.64 and 389.14

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Solution

The fourth proportional to 651.17, 898.64 and 389.14 is: 537.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.17 : 898.64 = 389.14 : x
  2. Step 2: Convert to fraction form
    651.17/898.64 = 389.14/x
  3. Step 3: Cross multiply
    651.17x = 898.64 × 389.14
  4. Step 4: Simplify right side
    651.17x = 349,696.77
  5. Step 5: Solve for x
    x = 349,696.77/651.17
  6. Step 6: Final answer
    x = 537.03

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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.