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Finding the Fourth Proportional to 703.47, 970.76 and 388.68

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Solution

The fourth proportional to 703.47, 970.76 and 388.68 is: 536.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.47 : 970.76 = 388.68 : x
  2. Step 2: Convert to fraction form
    703.47/970.76 = 388.68/x
  3. Step 3: Cross multiply
    703.47x = 970.76 × 388.68
  4. Step 4: Simplify right side
    703.47x = 377,313.05
  5. Step 5: Solve for x
    x = 377,313.05/703.47
  6. Step 6: Final answer
    x = 536.36

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.