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Finding the Fourth Proportional to 751.35, 1,036.89 and 436.80

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Solution

The fourth proportional to 751.35, 1,036.89 and 436.80 is: 602.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.35 : 1,036.89 = 436.80 : x
  2. Step 2: Convert to fraction form
    751.35/1,036.89 = 436.80/x
  3. Step 3: Cross multiply
    751.35x = 1,036.89 × 436.80
  4. Step 4: Simplify right side
    751.35x = 452,913.55
  5. Step 5: Solve for x
    x = 452,913.55/751.35
  6. Step 6: Final answer
    x = 602.80

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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.