Home / 1,400.35-1,931.50-1,189.08

Finding the Fourth Proportional to 1,400.35, 1,931.50 and 1,189.08

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Solution

The fourth proportional to 1,400.35, 1,931.50 and 1,189.08 is: 1,640.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.35 : 1,931.50 = 1,189.08 : x
  2. Step 2: Convert to fraction form
    1,400.35/1,931.50 = 1,189.08/x
  3. Step 3: Cross multiply
    1,400.35x = 1,931.50 × 1,189.08
  4. Step 4: Simplify right side
    1,400.35x = 2,296,708.02
  5. Step 5: Solve for x
    x = 2,296,708.02/1,400.35
  6. Step 6: Final answer
    x = 1,640.10

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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.