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Finding the Fourth Proportional to 386.19, 577.98 and 322.13

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Solution

The fourth proportional to 386.19, 577.98 and 322.13 is: 482.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.19 : 577.98 = 322.13 : x
  2. Step 2: Convert to fraction form
    386.19/577.98 = 322.13/x
  3. Step 3: Cross multiply
    386.19x = 577.98 × 322.13
  4. Step 4: Simplify right side
    386.19x = 186,184.70
  5. Step 5: Solve for x
    x = 186,184.70/386.19
  6. Step 6: Final answer
    x = 482.11

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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.