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Finding the Fourth Proportional to 651.07, 898.41 and 389.05

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Solution

The fourth proportional to 651.07, 898.41 and 389.05 is: 536.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.07 : 898.41 = 389.05 : x
  2. Step 2: Convert to fraction form
    651.07/898.41 = 389.05/x
  3. Step 3: Cross multiply
    651.07x = 898.41 × 389.05
  4. Step 4: Simplify right side
    651.07x = 349,526.41
  5. Step 5: Solve for x
    x = 349,526.41/651.07
  6. Step 6: Final answer
    x = 536.85

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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.