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Finding the Fourth Proportional to 770.75, 1,063.64 and 495.23

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Solution

The fourth proportional to 770.75, 1,063.64 and 495.23 is: 683.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.75 : 1,063.64 = 495.23 : x
  2. Step 2: Convert to fraction form
    770.75/1,063.64 = 495.23/x
  3. Step 3: Cross multiply
    770.75x = 1,063.64 × 495.23
  4. Step 4: Simplify right side
    770.75x = 526,746.44
  5. Step 5: Solve for x
    x = 526,746.44/770.75
  6. Step 6: Final answer
    x = 683.42

Related Problems

Find fourth proportional to 385.38, 531.82 and 247.62
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.