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Finding the Fourth Proportional to 700.97, 1,051.86 and 392.77

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Solution

The fourth proportional to 700.97, 1,051.86 and 392.77 is: 589.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.97 : 1,051.86 = 392.77 : x
  2. Step 2: Convert to fraction form
    700.97/1,051.86 = 392.77/x
  3. Step 3: Cross multiply
    700.97x = 1,051.86 × 392.77
  4. Step 4: Simplify right side
    700.97x = 413,133.79
  5. Step 5: Solve for x
    x = 413,133.79/700.97
  6. Step 6: Final answer
    x = 589.37

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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.