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Finding the Fourth Proportional to 651.48, 893.01 and 642.72

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Solution

The fourth proportional to 651.48, 893.01 and 642.72 is: 881.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.48 : 893.01 = 642.72 : x
  2. Step 2: Convert to fraction form
    651.48/893.01 = 642.72/x
  3. Step 3: Cross multiply
    651.48x = 893.01 × 642.72
  4. Step 4: Simplify right side
    651.48x = 573,958.99
  5. Step 5: Solve for x
    x = 573,958.99/651.48
  6. Step 6: Final answer
    x = 881.01

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.