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Finding the Fourth Proportional to 770.65, 1,063.42 and 475.93

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Solution

The fourth proportional to 770.65, 1,063.42 and 475.93 is: 656.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.65 : 1,063.42 = 475.93 : x
  2. Step 2: Convert to fraction form
    770.65/1,063.42 = 475.93/x
  3. Step 3: Cross multiply
    770.65x = 1,063.42 × 475.93
  4. Step 4: Simplify right side
    770.65x = 506,113.48
  5. Step 5: Solve for x
    x = 506,113.48/770.65
  6. Step 6: Final answer
    x = 656.74

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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.