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Finding the Fourth Proportional to 859.70, 1,186.37 and 466.71

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Solution

The fourth proportional to 859.70, 1,186.37 and 466.71 is: 644.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.70 : 1,186.37 = 466.71 : x
  2. Step 2: Convert to fraction form
    859.70/1,186.37 = 466.71/x
  3. Step 3: Cross multiply
    859.70x = 1,186.37 × 466.71
  4. Step 4: Simplify right side
    859.70x = 553,688.41
  5. Step 5: Solve for x
    x = 553,688.41/859.70
  6. Step 6: Final answer
    x = 644.05

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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.