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Finding the Fourth Proportional to 405,028.40, 606,376.20 and 247,564.40

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Solution

The fourth proportional to 405,028.40, 606,376.20 and 247,564.40 is: 370,633.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,028.40 : 606,376.20 = 247,564.40 : x
  2. Step 2: Convert to fraction form
    405,028.40/606,376.20 = 247,564.40/x
  3. Step 3: Cross multiply
    405,028.40x = 606,376.20 × 247,564.40
  4. Step 4: Simplify right side
    405,028.40x = 150,117,160,127.28
  5. Step 5: Solve for x
    x = 150,117,160,127.28/405,028.40
  6. Step 6: Final answer
    x = 370,633.66

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1.5x scale

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.