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Finding the Fourth Proportional to 405,460.80, 608,133.60 and 139,233.60

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Solution

The fourth proportional to 405,460.80, 608,133.60 and 139,233.60 is: 208,830.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,460.80 : 608,133.60 = 139,233.60 : x
  2. Step 2: Convert to fraction form
    405,460.80/608,133.60 = 139,233.60/x
  3. Step 3: Cross multiply
    405,460.80x = 608,133.60 × 139,233.60
  4. Step 4: Simplify right side
    405,460.80x = 84,672,630,408.96
  5. Step 5: Solve for x
    x = 84,672,630,408.96/405,460.80
  6. Step 6: Final answer
    x = 208,830.62

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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.