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Finding the Fourth Proportional to 682,376.40, 1,022,009.40 and 402,440.40

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Solution

The fourth proportional to 682,376.40, 1,022,009.40 and 402,440.40 is: 602,743.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    682,376.40 : 1,022,009.40 = 402,440.40 : x
  2. Step 2: Convert to fraction form
    682,376.40/1,022,009.40 = 402,440.40/x
  3. Step 3: Cross multiply
    682,376.40x = 1,022,009.40 × 402,440.40
  4. Step 4: Simplify right side
    682,376.40x = 411,297,871,739.76
  5. Step 5: Solve for x
    x = 411,297,871,739.76/682,376.40
  6. Step 6: Final answer
    x = 602,743.40

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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.