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Finding the Fourth Proportional to 847.18, 1,169.40 and 585.55

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Solution

The fourth proportional to 847.18, 1,169.40 and 585.55 is: 808.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.18 : 1,169.40 = 585.55 : x
  2. Step 2: Convert to fraction form
    847.18/1,169.40 = 585.55/x
  3. Step 3: Cross multiply
    847.18x = 1,169.40 × 585.55
  4. Step 4: Simplify right side
    847.18x = 684,742.17
  5. Step 5: Solve for x
    x = 684,742.17/847.18
  6. Step 6: Final answer
    x = 808.26

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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.