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Finding the Fourth Proportional to 405,881.60, 608,822.40 and 125,427.20

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Solution

The fourth proportional to 405,881.60, 608,822.40 and 125,427.20 is: 188,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,881.60 : 608,822.40 = 125,427.20 : x
  2. Step 2: Convert to fraction form
    405,881.60/608,822.40 = 125,427.20/x
  3. Step 3: Cross multiply
    405,881.60x = 608,822.40 × 125,427.20
  4. Step 4: Simplify right side
    405,881.60x = 76,362,888,929.28
  5. Step 5: Solve for x
    x = 76,362,888,929.28/405,881.60
  6. Step 6: Final answer
    x = 188,140.80

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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.