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Finding the Fourth Proportional to 682.55, 1,018.99 and 585.08

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Solution

The fourth proportional to 682.55, 1,018.99 and 585.08 is: 873.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.55 : 1,018.99 = 585.08 : x
  2. Step 2: Convert to fraction form
    682.55/1,018.99 = 585.08/x
  3. Step 3: Cross multiply
    682.55x = 1,018.99 × 585.08
  4. Step 4: Simplify right side
    682.55x = 596,190.67
  5. Step 5: Solve for x
    x = 596,190.67/682.55
  6. Step 6: Final answer
    x = 873.48

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.