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Finding the Fourth Proportional to 1,088.57, 1,501.44 and 690.36

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Solution

The fourth proportional to 1,088.57, 1,501.44 and 690.36 is: 952.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.57 : 1,501.44 = 690.36 : x
  2. Step 2: Convert to fraction form
    1,088.57/1,501.44 = 690.36/x
  3. Step 3: Cross multiply
    1,088.57x = 1,501.44 × 690.36
  4. Step 4: Simplify right side
    1,088.57x = 1,036,525.90
  5. Step 5: Solve for x
    x = 1,036,525.90/1,088.57
  6. Step 6: Final answer
    x = 952.19

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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.