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Finding the Fourth Proportional to 703.74, 970.70 and 408.76

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Solution

The fourth proportional to 703.74, 970.70 and 408.76 is: 563.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.74 : 970.70 = 408.76 : x
  2. Step 2: Convert to fraction form
    703.74/970.70 = 408.76/x
  3. Step 3: Cross multiply
    703.74x = 970.70 × 408.76
  4. Step 4: Simplify right side
    703.74x = 396,783.33
  5. Step 5: Solve for x
    x = 396,783.33/703.74
  6. Step 6: Final answer
    x = 563.82

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1.5x scale

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.