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Finding the Fourth Proportional to 804.53, 1,109.74 and 555.42

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Solution

The fourth proportional to 804.53, 1,109.74 and 555.42 is: 766.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.53 : 1,109.74 = 555.42 : x
  2. Step 2: Convert to fraction form
    804.53/1,109.74 = 555.42/x
  3. Step 3: Cross multiply
    804.53x = 1,109.74 × 555.42
  4. Step 4: Simplify right side
    804.53x = 616,371.79
  5. Step 5: Solve for x
    x = 616,371.79/804.53
  6. Step 6: Final answer
    x = 766.13

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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.