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Finding the Fourth Proportional to 703.65, 1,055.58 and 216.70

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Solution

The fourth proportional to 703.65, 1,055.58 and 216.70 is: 325.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.65 : 1,055.58 = 216.70 : x
  2. Step 2: Convert to fraction form
    703.65/1,055.58 = 216.70/x
  3. Step 3: Cross multiply
    703.65x = 1,055.58 × 216.70
  4. Step 4: Simplify right side
    703.65x = 228,738.91
  5. Step 5: Solve for x
    x = 228,738.91/703.65
  6. Step 6: Final answer
    x = 325.08

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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.