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Finding the Fourth Proportional to 647.58, 889.32 and 554.33

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Solution

The fourth proportional to 647.58, 889.32 and 554.33 is: 761.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.58 : 889.32 = 554.33 : x
  2. Step 2: Convert to fraction form
    647.58/889.32 = 554.33/x
  3. Step 3: Cross multiply
    647.58x = 889.32 × 554.33
  4. Step 4: Simplify right side
    647.58x = 492,972.31
  5. Step 5: Solve for x
    x = 492,972.31/647.58
  6. Step 6: Final answer
    x = 761.25

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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.