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Finding the Fourth Proportional to 790.69, 1,091.16 and 436.63

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Solution

The fourth proportional to 790.69, 1,091.16 and 436.63 is: 602.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.69 : 1,091.16 = 436.63 : x
  2. Step 2: Convert to fraction form
    790.69/1,091.16 = 436.63/x
  3. Step 3: Cross multiply
    790.69x = 1,091.16 × 436.63
  4. Step 4: Simplify right side
    790.69x = 476,427.74
  5. Step 5: Solve for x
    x = 476,427.74/790.69
  6. Step 6: Final answer
    x = 602.55

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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.