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Finding the Fourth Proportional to 770.69, 1,062.92 and 476.03

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Solution

The fourth proportional to 770.69, 1,062.92 and 476.03 is: 656.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.69 : 1,062.92 = 476.03 : x
  2. Step 2: Convert to fraction form
    770.69/1,062.92 = 476.03/x
  3. Step 3: Cross multiply
    770.69x = 1,062.92 × 476.03
  4. Step 4: Simplify right side
    770.69x = 505,981.81
  5. Step 5: Solve for x
    x = 505,981.81/770.69
  6. Step 6: Final answer
    x = 656.53

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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.