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Finding the Fourth Proportional to 977.82, 1,465.66 and 361.00

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Solution

The fourth proportional to 977.82, 1,465.66 and 361.00 is: 541.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.82 : 1,465.66 = 361.00 : x
  2. Step 2: Convert to fraction form
    977.82/1,465.66 = 361.00/x
  3. Step 3: Cross multiply
    977.82x = 1,465.66 × 361.00
  4. Step 4: Simplify right side
    977.82x = 529,106.92
  5. Step 5: Solve for x
    x = 529,106.92/977.82
  6. Step 6: Final answer
    x = 541.11

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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.