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Finding the Fourth Proportional to 1,088.64, 1,620 and 1,065.96

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Solution

The fourth proportional to 1,088.64, 1,620 and 1,065.96 is: 1,586.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.64 : 1,620 = 1,065.96 : x
  2. Step 2: Convert to fraction form
    1,088.64/1,620 = 1,065.96/x
  3. Step 3: Cross multiply
    1,088.64x = 1,620 × 1,065.96
  4. Step 4: Simplify right side
    1,088.64x = 1,726,855.20
  5. Step 5: Solve for x
    x = 1,726,855.20/1,088.64
  6. Step 6: Final answer
    x = 1,586.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.