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Finding the Fourth Proportional to 648.83, 895.03 and 386.66

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Solution

The fourth proportional to 648.83, 895.03 and 386.66 is: 533.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.83 : 895.03 = 386.66 : x
  2. Step 2: Convert to fraction form
    648.83/895.03 = 386.66/x
  3. Step 3: Cross multiply
    648.83x = 895.03 × 386.66
  4. Step 4: Simplify right side
    648.83x = 346,065.89
  5. Step 5: Solve for x
    x = 346,065.89/648.83
  6. Step 6: Final answer
    x = 533.37

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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.