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Finding the Fourth Proportional to 371, 511.78 and 297.40

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Solution

The fourth proportional to 371, 511.78 and 297.40 is: 410.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    371 : 511.78 = 297.40 : x
  2. Step 2: Convert to fraction form
    371/511.78 = 297.40/x
  3. Step 3: Cross multiply
    371x = 511.78 × 297.40
  4. Step 4: Simplify right side
    371x = 152,203.37
  5. Step 5: Solve for x
    x = 152,203.37/371
  6. Step 6: Final answer
    x = 410.25

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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.