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Finding the Fourth Proportional to 770.19, 1,061.96 and 622.37

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Solution

The fourth proportional to 770.19, 1,061.96 and 622.37 is: 858.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.19 : 1,061.96 = 622.37 : x
  2. Step 2: Convert to fraction form
    770.19/1,061.96 = 622.37/x
  3. Step 3: Cross multiply
    770.19x = 1,061.96 × 622.37
  4. Step 4: Simplify right side
    770.19x = 660,923.62
  5. Step 5: Solve for x
    x = 660,923.62/770.19
  6. Step 6: Final answer
    x = 858.13

Related Problems

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Half scale
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Double scale
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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.