Home / 2,145.90-3,220.65-1,051.20

Finding the Fourth Proportional to 2,145.90, 3,220.65 and 1,051.20

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Solution

The fourth proportional to 2,145.90, 3,220.65 and 1,051.20 is: 1,577.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.90 : 3,220.65 = 1,051.20 : x
  2. Step 2: Convert to fraction form
    2,145.90/3,220.65 = 1,051.20/x
  3. Step 3: Cross multiply
    2,145.90x = 3,220.65 × 1,051.20
  4. Step 4: Simplify right side
    2,145.90x = 3,385,547.28
  5. Step 5: Solve for x
    x = 3,385,547.28/2,145.90
  6. Step 6: Final answer
    x = 1,577.68

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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.