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Finding the Fourth Proportional to 707.76, 977.04 and 459.42

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Solution

The fourth proportional to 707.76, 977.04 and 459.42 is: 634.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.76 : 977.04 = 459.42 : x
  2. Step 2: Convert to fraction form
    707.76/977.04 = 459.42/x
  3. Step 3: Cross multiply
    707.76x = 977.04 × 459.42
  4. Step 4: Simplify right side
    707.76x = 448,871.72
  5. Step 5: Solve for x
    x = 448,871.72/707.76
  6. Step 6: Final answer
    x = 634.21

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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.