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Finding the Fourth Proportional to 554.78, 765.90 and 436.52

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Solution

The fourth proportional to 554.78, 765.90 and 436.52 is: 602.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.78 : 765.90 = 436.52 : x
  2. Step 2: Convert to fraction form
    554.78/765.90 = 436.52/x
  3. Step 3: Cross multiply
    554.78x = 765.90 × 436.52
  4. Step 4: Simplify right side
    554.78x = 334,326.84
  5. Step 5: Solve for x
    x = 334,326.84/554.78
  6. Step 6: Final answer
    x = 602.64

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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.