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Finding the Fourth Proportional to 703.17, 970.41 and 388.45

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Solution

The fourth proportional to 703.17, 970.41 and 388.45 is: 536.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.17 : 970.41 = 388.45 : x
  2. Step 2: Convert to fraction form
    703.17/970.41 = 388.45/x
  3. Step 3: Cross multiply
    703.17x = 970.41 × 388.45
  4. Step 4: Simplify right side
    703.17x = 376,955.76
  5. Step 5: Solve for x
    x = 376,955.76/703.17
  6. Step 6: Final answer
    x = 536.08

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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.