Home / 1,557.20-2,143.32-1,090.64

Finding the Fourth Proportional to 1,557.20, 2,143.32 and 1,090.64

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Solution

The fourth proportional to 1,557.20, 2,143.32 and 1,090.64 is: 1,501.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.20 : 2,143.32 = 1,090.64 : x
  2. Step 2: Convert to fraction form
    1,557.20/2,143.32 = 1,090.64/x
  3. Step 3: Cross multiply
    1,557.20x = 2,143.32 × 1,090.64
  4. Step 4: Simplify right side
    1,557.20x = 2,337,590.52
  5. Step 5: Solve for x
    x = 2,337,590.52/1,557.20
  6. Step 6: Final answer
    x = 1,501.15

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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.