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Finding the Fourth Proportional to 858.03, 1,291.74 and 585.85

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Solution

The fourth proportional to 858.03, 1,291.74 and 585.85 is: 881.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.03 : 1,291.74 = 585.85 : x
  2. Step 2: Convert to fraction form
    858.03/1,291.74 = 585.85/x
  3. Step 3: Cross multiply
    858.03x = 1,291.74 × 585.85
  4. Step 4: Simplify right side
    858.03x = 756,762.95
  5. Step 5: Solve for x
    x = 756,762.95/858.03
  6. Step 6: Final answer
    x = 881.98

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.