Home / 2,154.40-2,972.96-1,210.20

Finding the Fourth Proportional to 2,154.40, 2,972.96 and 1,210.20

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Solution

The fourth proportional to 2,154.40, 2,972.96 and 1,210.20 is: 1,670.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.40 : 2,972.96 = 1,210.20 : x
  2. Step 2: Convert to fraction form
    2,154.40/2,972.96 = 1,210.20/x
  3. Step 3: Cross multiply
    2,154.40x = 2,972.96 × 1,210.20
  4. Step 4: Simplify right side
    2,154.40x = 3,597,876.19
  5. Step 5: Solve for x
    x = 3,597,876.19/2,154.40
  6. Step 6: Final answer
    x = 1,670.01

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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.