Home / 2,140.16-3,209.76-753.08

Finding the Fourth Proportional to 2,140.16, 3,209.76 and 753.08

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Solution

The fourth proportional to 2,140.16, 3,209.76 and 753.08 is: 1,129.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.16 : 3,209.76 = 753.08 : x
  2. Step 2: Convert to fraction form
    2,140.16/3,209.76 = 753.08/x
  3. Step 3: Cross multiply
    2,140.16x = 3,209.76 × 753.08
  4. Step 4: Simplify right side
    2,140.16x = 2,417,206.06
  5. Step 5: Solve for x
    x = 2,417,206.06/2,140.16
  6. Step 6: Final answer
    x = 1,129.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.