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Finding the Fourth Proportional to 405,277.67, 607,928.80 and 139,034.35

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Solution

The fourth proportional to 405,277.67, 607,928.80 and 139,034.35 is: 208,555.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,277.67 : 607,928.80 = 139,034.35 : x
  2. Step 2: Convert to fraction form
    405,277.67/607,928.80 = 139,034.35/x
  3. Step 3: Cross multiply
    405,277.67x = 607,928.80 × 139,034.35
  4. Step 4: Simplify right side
    405,277.67x = 84,522,985,554.28
  5. Step 5: Solve for x
    x = 84,522,985,554.28/405,277.67
  6. Step 6: Final answer
    x = 208,555.74

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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.