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Finding the Fourth Proportional to 5,328.16, 7,990.32 and 1,868.32

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Solution

The fourth proportional to 5,328.16, 7,990.32 and 1,868.32 is: 2,801.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,328.16 : 7,990.32 = 1,868.32 : x
  2. Step 2: Convert to fraction form
    5,328.16/7,990.32 = 1,868.32/x
  3. Step 3: Cross multiply
    5,328.16x = 7,990.32 × 1,868.32
  4. Step 4: Simplify right side
    5,328.16x = 14,928,474.66
  5. Step 5: Solve for x
    x = 14,928,474.66/5,328.16
  6. Step 6: Final answer
    x = 2,801.81

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1.5x scale

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.