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Finding the Fourth Proportional to 3,058.02, 4,586.99 and 978

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Solution

The fourth proportional to 3,058.02, 4,586.99 and 978 is: 1,466.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,058.02 : 4,586.99 = 978 : x
  2. Step 2: Convert to fraction form
    3,058.02/4,586.99 = 978/x
  3. Step 3: Cross multiply
    3,058.02x = 4,586.99 × 978
  4. Step 4: Simplify right side
    3,058.02x = 4,486,076.22
  5. Step 5: Solve for x
    x = 4,486,076.22/3,058.02
  6. Step 6: Final answer
    x = 1,466.99

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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.