Home / 2,129.04-2,938.08-1,431.36

Finding the Fourth Proportional to 2,129.04, 2,938.08 and 1,431.36

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Solution

The fourth proportional to 2,129.04, 2,938.08 and 1,431.36 is: 1,975.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.04 : 2,938.08 = 1,431.36 : x
  2. Step 2: Convert to fraction form
    2,129.04/2,938.08 = 1,431.36/x
  3. Step 3: Cross multiply
    2,129.04x = 2,938.08 × 1,431.36
  4. Step 4: Simplify right side
    2,129.04x = 4,205,450.19
  5. Step 5: Solve for x
    x = 4,205,450.19/2,129.04
  6. Step 6: Final answer
    x = 1,975.28

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1.5x scale

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.