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Finding the Fourth Proportional to 405,006.40, 606,634.80 and 360,683.20

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Solution

The fourth proportional to 405,006.40, 606,634.80 and 360,683.20 is: 540,245.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,006.40 : 606,634.80 = 360,683.20 : x
  2. Step 2: Convert to fraction form
    405,006.40/606,634.80 = 360,683.20/x
  3. Step 3: Cross multiply
    405,006.40x = 606,634.80 × 360,683.20
  4. Step 4: Simplify right side
    405,006.40x = 218,802,980,895.36
  5. Step 5: Solve for x
    x = 218,802,980,895.36/405,006.40
  6. Step 6: Final answer
    x = 540,245.74

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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.