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Finding the Fourth Proportional to 656.21, 904.40 and 579.83

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Solution

The fourth proportional to 656.21, 904.40 and 579.83 is: 799.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.21 : 904.40 = 579.83 : x
  2. Step 2: Convert to fraction form
    656.21/904.40 = 579.83/x
  3. Step 3: Cross multiply
    656.21x = 904.40 × 579.83
  4. Step 4: Simplify right side
    656.21x = 524,390.83
  5. Step 5: Solve for x
    x = 524,390.83/656.21
  6. Step 6: Final answer
    x = 799.13

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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.