Home / 1,431.68-1,972.08-1,011.29

Finding the Fourth Proportional to 1,431.68, 1,972.08 and 1,011.29

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Solution

The fourth proportional to 1,431.68, 1,972.08 and 1,011.29 is: 1,393.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.68 : 1,972.08 = 1,011.29 : x
  2. Step 2: Convert to fraction form
    1,431.68/1,972.08 = 1,011.29/x
  3. Step 3: Cross multiply
    1,431.68x = 1,972.08 × 1,011.29
  4. Step 4: Simplify right side
    1,431.68x = 1,994,334.92
  5. Step 5: Solve for x
    x = 1,994,334.92/1,431.68
  6. Step 6: Final answer
    x = 1,393.01

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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.