Home / 405,281.46-607,934.55-139,038.21

Finding the Fourth Proportional to 405,281.46, 607,934.55 and 139,038.21

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Solution

The fourth proportional to 405,281.46, 607,934.55 and 139,038.21 is: 208,561.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,281.46 : 607,934.55 = 139,038.21 : x
  2. Step 2: Convert to fraction form
    405,281.46/607,934.55 = 139,038.21/x
  3. Step 3: Cross multiply
    405,281.46x = 607,934.55 × 139,038.21
  4. Step 4: Simplify right side
    405,281.46x = 84,526,131,629.16
  5. Step 5: Solve for x
    x = 84,526,131,629.16/405,281.46
  6. Step 6: Final answer
    x = 208,561.56

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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.