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Finding the Fourth Proportional to 704.81, 972.63 and 555.59

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Solution

The fourth proportional to 704.81, 972.63 and 555.59 is: 766.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.81 : 972.63 = 555.59 : x
  2. Step 2: Convert to fraction form
    704.81/972.63 = 555.59/x
  3. Step 3: Cross multiply
    704.81x = 972.63 × 555.59
  4. Step 4: Simplify right side
    704.81x = 540,385.93
  5. Step 5: Solve for x
    x = 540,385.93/704.81
  6. Step 6: Final answer
    x = 766.71

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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.