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Finding the Fourth Proportional to 768.19, 1,060.19 and 436.66

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Solution

The fourth proportional to 768.19, 1,060.19 and 436.66 is: 602.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.19 : 1,060.19 = 436.66 : x
  2. Step 2: Convert to fraction form
    768.19/1,060.19 = 436.66/x
  3. Step 3: Cross multiply
    768.19x = 1,060.19 × 436.66
  4. Step 4: Simplify right side
    768.19x = 462,945.54
  5. Step 5: Solve for x
    x = 462,945.54/768.19
  6. Step 6: Final answer
    x = 602.65

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1.5x scale

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.