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Finding the Fourth Proportional to 767.03, 1,058.20 and 451.80

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Solution

The fourth proportional to 767.03, 1,058.20 and 451.80 is: 623.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.03 : 1,058.20 = 451.80 : x
  2. Step 2: Convert to fraction form
    767.03/1,058.20 = 451.80/x
  3. Step 3: Cross multiply
    767.03x = 1,058.20 × 451.80
  4. Step 4: Simplify right side
    767.03x = 478,087.21
  5. Step 5: Solve for x
    x = 478,087.21/767.03
  6. Step 6: Final answer
    x = 623.30

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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.