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Finding the Fourth Proportional to 645.51, 890.73 and 534.54

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Solution

The fourth proportional to 645.51, 890.73 and 534.54 is: 737.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.51 : 890.73 = 534.54 : x
  2. Step 2: Convert to fraction form
    645.51/890.73 = 534.54/x
  3. Step 3: Cross multiply
    645.51x = 890.73 × 534.54
  4. Step 4: Simplify right side
    645.51x = 476,130.81
  5. Step 5: Solve for x
    x = 476,130.81/645.51
  6. Step 6: Final answer
    x = 737.60

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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.