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Finding the Fourth Proportional to 521.27, 719.99 and 412.19

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Solution

The fourth proportional to 521.27, 719.99 and 412.19 is: 569.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.27 : 719.99 = 412.19 : x
  2. Step 2: Convert to fraction form
    521.27/719.99 = 412.19/x
  3. Step 3: Cross multiply
    521.27x = 719.99 × 412.19
  4. Step 4: Simplify right side
    521.27x = 296,767.02
  5. Step 5: Solve for x
    x = 296,767.02/521.27
  6. Step 6: Final answer
    x = 569.32

Related Problems

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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.