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Finding the Fourth Proportional to 542.76, 748.74 and 395.16

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Solution

The fourth proportional to 542.76, 748.74 and 395.16 is: 545.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.76 : 748.74 = 395.16 : x
  2. Step 2: Convert to fraction form
    542.76/748.74 = 395.16/x
  3. Step 3: Cross multiply
    542.76x = 748.74 × 395.16
  4. Step 4: Simplify right side
    542.76x = 295,872.10
  5. Step 5: Solve for x
    x = 295,872.10/542.76
  6. Step 6: Final answer
    x = 545.13

Related Problems

Find fourth proportional to 271.38, 374.37 and 197.58
Half scale
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Double scale
Find fourth proportional to 543.76, 750.12 and 396.16
Similar ratio
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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.