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Finding the Fourth Proportional to 405,862.40, 607,918.80 and 361,539.20

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Solution

The fourth proportional to 405,862.40, 607,918.80 and 361,539.20 is: 541,529.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,862.40 : 607,918.80 = 361,539.20 : x
  2. Step 2: Convert to fraction form
    405,862.40/607,918.80 = 361,539.20/x
  3. Step 3: Cross multiply
    405,862.40x = 607,918.80 × 361,539.20
  4. Step 4: Simplify right side
    405,862.40x = 219,786,476,616.96
  5. Step 5: Solve for x
    x = 219,786,476,616.96/405,862.40
  6. Step 6: Final answer
    x = 541,529.53

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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.