Home / 856,409.40-1,282,870.17-405,764.28

Finding the Fourth Proportional to 856,409.40, 1,282,870.17 and 405,764.28

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Solution

The fourth proportional to 856,409.40, 1,282,870.17 and 405,764.28 is: 607,820.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,409.40 : 1,282,870.17 = 405,764.28 : x
  2. Step 2: Convert to fraction form
    856,409.40/1,282,870.17 = 405,764.28/x
  3. Step 3: Cross multiply
    856,409.40x = 1,282,870.17 × 405,764.28
  4. Step 4: Simplify right side
    856,409.40x = 520,542,890,863.53
  5. Step 5: Solve for x
    x = 520,542,890,863.53/856,409.40
  6. Step 6: Final answer
    x = 607,820.15

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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.