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Finding the Fourth Proportional to 1,307.52, 1,961.34 and 383.07

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Solution

The fourth proportional to 1,307.52, 1,961.34 and 383.07 is: 574.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.52 : 1,961.34 = 383.07 : x
  2. Step 2: Convert to fraction form
    1,307.52/1,961.34 = 383.07/x
  3. Step 3: Cross multiply
    1,307.52x = 1,961.34 × 383.07
  4. Step 4: Simplify right side
    1,307.52x = 751,330.51
  5. Step 5: Solve for x
    x = 751,330.51/1,307.52
  6. Step 6: Final answer
    x = 574.62

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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.