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Finding the Fourth Proportional to 648.97, 895.58 and 386.99

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Solution

The fourth proportional to 648.97, 895.58 and 386.99 is: 534.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.97 : 895.58 = 386.99 : x
  2. Step 2: Convert to fraction form
    648.97/895.58 = 386.99/x
  3. Step 3: Cross multiply
    648.97x = 895.58 × 386.99
  4. Step 4: Simplify right side
    648.97x = 346,580.50
  5. Step 5: Solve for x
    x = 346,580.50/648.97
  6. Step 6: Final answer
    x = 534.05

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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.