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Finding the Fourth Proportional to 1,330.58, 1,994.47 and 452.77

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Solution

The fourth proportional to 1,330.58, 1,994.47 and 452.77 is: 678.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.58 : 1,994.47 = 452.77 : x
  2. Step 2: Convert to fraction form
    1,330.58/1,994.47 = 452.77/x
  3. Step 3: Cross multiply
    1,330.58x = 1,994.47 × 452.77
  4. Step 4: Simplify right side
    1,330.58x = 903,030.06
  5. Step 5: Solve for x
    x = 903,030.06/1,330.58
  6. Step 6: Final answer
    x = 678.67

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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.