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Finding the Fourth Proportional to 700.85, 967.14 and 420.92

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Solution

The fourth proportional to 700.85, 967.14 and 420.92 is: 580.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.85 : 967.14 = 420.92 : x
  2. Step 2: Convert to fraction form
    700.85/967.14 = 420.92/x
  3. Step 3: Cross multiply
    700.85x = 967.14 × 420.92
  4. Step 4: Simplify right side
    700.85x = 407,088.57
  5. Step 5: Solve for x
    x = 407,088.57/700.85
  6. Step 6: Final answer
    x = 580.85

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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.