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Finding the Fourth Proportional to 1,430.64, 1,974.06 and 933.48

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Solution

The fourth proportional to 1,430.64, 1,974.06 and 933.48 is: 1,288.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.64 : 1,974.06 = 933.48 : x
  2. Step 2: Convert to fraction form
    1,430.64/1,974.06 = 933.48/x
  3. Step 3: Cross multiply
    1,430.64x = 1,974.06 × 933.48
  4. Step 4: Simplify right side
    1,430.64x = 1,842,745.53
  5. Step 5: Solve for x
    x = 1,842,745.53/1,430.64
  6. Step 6: Final answer
    x = 1,288.06

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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.