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Finding the Fourth Proportional to 679.35, 1,018.61 and 370.77

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Solution

The fourth proportional to 679.35, 1,018.61 and 370.77 is: 555.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.35 : 1,018.61 = 370.77 : x
  2. Step 2: Convert to fraction form
    679.35/1,018.61 = 370.77/x
  3. Step 3: Cross multiply
    679.35x = 1,018.61 × 370.77
  4. Step 4: Simplify right side
    679.35x = 377,671.77
  5. Step 5: Solve for x
    x = 377,671.77/679.35
  6. Step 6: Final answer
    x = 555.93

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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.