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Finding the Fourth Proportional to 656.64, 985.03 and 291.35

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Solution

The fourth proportional to 656.64, 985.03 and 291.35 is: 437.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.64 : 985.03 = 291.35 : x
  2. Step 2: Convert to fraction form
    656.64/985.03 = 291.35/x
  3. Step 3: Cross multiply
    656.64x = 985.03 × 291.35
  4. Step 4: Simplify right side
    656.64x = 286,990.22
  5. Step 5: Solve for x
    x = 286,990.22/656.64
  6. Step 6: Final answer
    x = 437.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.