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Finding the Fourth Proportional to 805.84, 1,111.56 and 585.04

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Solution

The fourth proportional to 805.84, 1,111.56 and 585.04 is: 806.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.84 : 1,111.56 = 585.04 : x
  2. Step 2: Convert to fraction form
    805.84/1,111.56 = 585.04/x
  3. Step 3: Cross multiply
    805.84x = 1,111.56 × 585.04
  4. Step 4: Simplify right side
    805.84x = 650,307.06
  5. Step 5: Solve for x
    x = 650,307.06/805.84
  6. Step 6: Final answer
    x = 806.99

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Double scale
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1.5x scale

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.