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Finding the Fourth Proportional to 770.04, 1,063.82 and 505.11

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Solution

The fourth proportional to 770.04, 1,063.82 and 505.11 is: 697.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.04 : 1,063.82 = 505.11 : x
  2. Step 2: Convert to fraction form
    770.04/1,063.82 = 505.11/x
  3. Step 3: Cross multiply
    770.04x = 1,063.82 × 505.11
  4. Step 4: Simplify right side
    770.04x = 537,346.12
  5. Step 5: Solve for x
    x = 537,346.12/770.04
  6. Step 6: Final answer
    x = 697.82

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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.