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Finding the Fourth Proportional to 562.95, 777.20 and 386.17

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Solution

The fourth proportional to 562.95, 777.20 and 386.17 is: 533.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.95 : 777.20 = 386.17 : x
  2. Step 2: Convert to fraction form
    562.95/777.20 = 386.17/x
  3. Step 3: Cross multiply
    562.95x = 777.20 × 386.17
  4. Step 4: Simplify right side
    562.95x = 300,127.45
  5. Step 5: Solve for x
    x = 300,127.45/562.95
  6. Step 6: Final answer
    x = 533.13

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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.