Home / 2,130.75-2,938.55-1,384.00

Finding the Fourth Proportional to 2,130.75, 2,938.55 and 1,384.00

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Solution

The fourth proportional to 2,130.75, 2,938.55 and 1,384.00 is: 1,908.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.75 : 2,938.55 = 1,384.00 : x
  2. Step 2: Convert to fraction form
    2,130.75/2,938.55 = 1,384.00/x
  3. Step 3: Cross multiply
    2,130.75x = 2,938.55 × 1,384.00
  4. Step 4: Simplify right side
    2,130.75x = 4,066,938.93
  5. Step 5: Solve for x
    x = 4,066,938.93/2,130.75
  6. Step 6: Final answer
    x = 1,908.69

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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.