Home / 1,580.34-2,181.12-917.58

Finding the Fourth Proportional to 1,580.34, 2,181.12 and 917.58

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Solution

The fourth proportional to 1,580.34, 2,181.12 and 917.58 is: 1,266.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.34 : 2,181.12 = 917.58 : x
  2. Step 2: Convert to fraction form
    1,580.34/2,181.12 = 917.58/x
  3. Step 3: Cross multiply
    1,580.34x = 2,181.12 × 917.58
  4. Step 4: Simplify right side
    1,580.34x = 2,001,352.09
  5. Step 5: Solve for x
    x = 2,001,352.09/1,580.34
  6. Step 6: Final answer
    x = 1,266.41

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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.