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Finding the Fourth Proportional to 554.75, 764.23 and 388.65

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Solution

The fourth proportional to 554.75, 764.23 and 388.65 is: 535.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.75 : 764.23 = 388.65 : x
  2. Step 2: Convert to fraction form
    554.75/764.23 = 388.65/x
  3. Step 3: Cross multiply
    554.75x = 764.23 × 388.65
  4. Step 4: Simplify right side
    554.75x = 297,017.99
  5. Step 5: Solve for x
    x = 297,017.99/554.75
  6. Step 6: Final answer
    x = 535.41

Related Problems

Find fourth proportional to 277.38, 382.12 and 194.33
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Double scale
Find fourth proportional to 555.75, 765.61 and 389.65
Similar ratio
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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.