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Finding the Fourth Proportional to 2,928.18, 4,391.85 and 953.99

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Solution

The fourth proportional to 2,928.18, 4,391.85 and 953.99 is: 1,430.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.18 : 4,391.85 = 953.99 : x
  2. Step 2: Convert to fraction form
    2,928.18/4,391.85 = 953.99/x
  3. Step 3: Cross multiply
    2,928.18x = 4,391.85 × 953.99
  4. Step 4: Simplify right side
    2,928.18x = 4,189,803.77
  5. Step 5: Solve for x
    x = 4,189,803.77/2,928.18
  6. Step 6: Final answer
    x = 1,430.85

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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.