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Finding the Fourth Proportional to 770.92, 1,063.62 and 476.08

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Solution

The fourth proportional to 770.92, 1,063.62 and 476.08 is: 656.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.92 : 1,063.62 = 476.08 : x
  2. Step 2: Convert to fraction form
    770.92/1,063.62 = 476.08/x
  3. Step 3: Cross multiply
    770.92x = 1,063.62 × 476.08
  4. Step 4: Simplify right side
    770.92x = 506,368.21
  5. Step 5: Solve for x
    x = 506,368.21/770.92
  6. Step 6: Final answer
    x = 656.84

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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.