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Finding the Fourth Proportional to 405,298.76, 607,960.48 and 139,055.52

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Solution

The fourth proportional to 405,298.76, 607,960.48 and 139,055.52 is: 208,587.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,298.76 : 607,960.48 = 139,055.52 : x
  2. Step 2: Convert to fraction form
    405,298.76/607,960.48 = 139,055.52/x
  3. Step 3: Cross multiply
    405,298.76x = 607,960.48 × 139,055.52
  4. Step 4: Simplify right side
    405,298.76x = 84,540,260,685.85
  5. Step 5: Solve for x
    x = 84,540,260,685.85/405,298.76
  6. Step 6: Final answer
    x = 208,587.51

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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.