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Finding the Fourth Proportional to 677.80, 935.40 and 383.08

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Solution

The fourth proportional to 677.80, 935.40 and 383.08 is: 528.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.80 : 935.40 = 383.08 : x
  2. Step 2: Convert to fraction form
    677.80/935.40 = 383.08/x
  3. Step 3: Cross multiply
    677.80x = 935.40 × 383.08
  4. Step 4: Simplify right side
    677.80x = 358,333.03
  5. Step 5: Solve for x
    x = 358,333.03/677.80
  6. Step 6: Final answer
    x = 528.67

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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.