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Finding the Fourth Proportional to 541.40, 812.10 and 357.80

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Solution

The fourth proportional to 541.40, 812.10 and 357.80 is: 536.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.40 : 812.10 = 357.80 : x
  2. Step 2: Convert to fraction form
    541.40/812.10 = 357.80/x
  3. Step 3: Cross multiply
    541.40x = 812.10 × 357.80
  4. Step 4: Simplify right side
    541.40x = 290,569.38
  5. Step 5: Solve for x
    x = 290,569.38/541.40
  6. Step 6: Final answer
    x = 536.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.