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Finding the Fourth Proportional to 648.96, 973.14 and 389.10

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Solution

The fourth proportional to 648.96, 973.14 and 389.10 is: 583.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.96 : 973.14 = 389.10 : x
  2. Step 2: Convert to fraction form
    648.96/973.14 = 389.10/x
  3. Step 3: Cross multiply
    648.96x = 973.14 × 389.10
  4. Step 4: Simplify right side
    648.96x = 378,648.77
  5. Step 5: Solve for x
    x = 378,648.77/648.96
  6. Step 6: Final answer
    x = 583.47

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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.