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Finding the Fourth Proportional to 648.99, 895.55 and 383.58

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Solution

The fourth proportional to 648.99, 895.55 and 383.58 is: 529.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.99 : 895.55 = 383.58 : x
  2. Step 2: Convert to fraction form
    648.99/895.55 = 383.58/x
  3. Step 3: Cross multiply
    648.99x = 895.55 × 383.58
  4. Step 4: Simplify right side
    648.99x = 343,513.15
  5. Step 5: Solve for x
    x = 343,513.15/648.99
  6. Step 6: Final answer
    x = 529.30

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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.