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Finding the Fourth Proportional to 405,754.86, 608,672.88 and 139,480.32

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Solution

The fourth proportional to 405,754.86, 608,672.88 and 139,480.32 is: 209,234.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,754.86 : 608,672.88 = 139,480.32 : x
  2. Step 2: Convert to fraction form
    405,754.86/608,672.88 = 139,480.32/x
  3. Step 3: Cross multiply
    405,754.86x = 608,672.88 × 139,480.32
  4. Step 4: Simplify right side
    405,754.86x = 84,897,888,077.72
  5. Step 5: Solve for x
    x = 84,897,888,077.72/405,754.86
  6. Step 6: Final answer
    x = 209,234.43

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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.