Home / 1,620.01-2,235.36-921.25

Finding the Fourth Proportional to 1,620.01, 2,235.36 and 921.25

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Solution

The fourth proportional to 1,620.01, 2,235.36 and 921.25 is: 1,271.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.01 : 2,235.36 = 921.25 : x
  2. Step 2: Convert to fraction form
    1,620.01/2,235.36 = 921.25/x
  3. Step 3: Cross multiply
    1,620.01x = 2,235.36 × 921.25
  4. Step 4: Simplify right side
    1,620.01x = 2,059,325.40
  5. Step 5: Solve for x
    x = 2,059,325.40/1,620.01
  6. Step 6: Final answer
    x = 1,271.18

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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.