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Finding the Fourth Proportional to 477.99, 716.00 and 386.19

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Solution

The fourth proportional to 477.99, 716.00 and 386.19 is: 578.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.99 : 716.00 = 386.19 : x
  2. Step 2: Convert to fraction form
    477.99/716.00 = 386.19/x
  3. Step 3: Cross multiply
    477.99x = 716.00 × 386.19
  4. Step 4: Simplify right side
    477.99x = 276,510.11
  5. Step 5: Solve for x
    x = 276,510.11/477.99
  6. Step 6: Final answer
    x = 578.49

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.