Home / 405,875.15-608,806.34-139,637.97

Finding the Fourth Proportional to 405,875.15, 608,806.34 and 139,637.97

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Solution

The fourth proportional to 405,875.15, 608,806.34 and 139,637.97 is: 209,454.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,875.15 : 608,806.34 = 139,637.97 : x
  2. Step 2: Convert to fraction form
    405,875.15/608,806.34 = 139,637.97/x
  3. Step 3: Cross multiply
    405,875.15x = 608,806.34 × 139,637.97
  4. Step 4: Simplify right side
    405,875.15x = 85,012,480,742.54
  5. Step 5: Solve for x
    x = 85,012,480,742.54/405,875.15
  6. Step 6: Final answer
    x = 209,454.76

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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.