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Finding the Fourth Proportional to 770.24, 1,062.18 and 692.75

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Solution

The fourth proportional to 770.24, 1,062.18 and 692.75 is: 955.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.24 : 1,062.18 = 692.75 : x
  2. Step 2: Convert to fraction form
    770.24/1,062.18 = 692.75/x
  3. Step 3: Cross multiply
    770.24x = 1,062.18 × 692.75
  4. Step 4: Simplify right side
    770.24x = 735,827.85
  5. Step 5: Solve for x
    x = 735,827.85/770.24
  6. Step 6: Final answer
    x = 955.32

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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.