Home / 1,340.07-2,009.56-415.45

Finding the Fourth Proportional to 1,340.07, 2,009.56 and 415.45

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Solution

The fourth proportional to 1,340.07, 2,009.56 and 415.45 is: 623.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.07 : 2,009.56 = 415.45 : x
  2. Step 2: Convert to fraction form
    1,340.07/2,009.56 = 415.45/x
  3. Step 3: Cross multiply
    1,340.07x = 2,009.56 × 415.45
  4. Step 4: Simplify right side
    1,340.07x = 834,871.70
  5. Step 5: Solve for x
    x = 834,871.70/1,340.07
  6. Step 6: Final answer
    x = 623.01

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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.