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Finding the Fourth Proportional to 804.21, 1,210.58 and 574.71

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Solution

The fourth proportional to 804.21, 1,210.58 and 574.71 is: 865.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.21 : 1,210.58 = 574.71 : x
  2. Step 2: Convert to fraction form
    804.21/1,210.58 = 574.71/x
  3. Step 3: Cross multiply
    804.21x = 1,210.58 × 574.71
  4. Step 4: Simplify right side
    804.21x = 695,729.56
  5. Step 5: Solve for x
    x = 695,729.56/804.21
  6. Step 6: Final answer
    x = 865.11

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Double scale
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1.5x scale

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.