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Finding the Fourth Proportional to 656.21, 904.73 and 479.43

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Solution

The fourth proportional to 656.21, 904.73 and 479.43 is: 661.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.21 : 904.73 = 479.43 : x
  2. Step 2: Convert to fraction form
    656.21/904.73 = 479.43/x
  3. Step 3: Cross multiply
    656.21x = 904.73 × 479.43
  4. Step 4: Simplify right side
    656.21x = 433,752.31
  5. Step 5: Solve for x
    x = 433,752.31/656.21
  6. Step 6: Final answer
    x = 661.00

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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.