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Finding the Fourth Proportional to 707.64, 975.94 and 427.81

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Solution

The fourth proportional to 707.64, 975.94 and 427.81 is: 590.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.64 : 975.94 = 427.81 : x
  2. Step 2: Convert to fraction form
    707.64/975.94 = 427.81/x
  3. Step 3: Cross multiply
    707.64x = 975.94 × 427.81
  4. Step 4: Simplify right side
    707.64x = 417,516.89
  5. Step 5: Solve for x
    x = 417,516.89/707.64
  6. Step 6: Final answer
    x = 590.01

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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.