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Finding the Fourth Proportional to 421,205.77, 581,196.77 and 239,921.29

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Solution

The fourth proportional to 421,205.77, 581,196.77 and 239,921.29 is: 331,053.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,205.77 : 581,196.77 = 239,921.29 : x
  2. Step 2: Convert to fraction form
    421,205.77/581,196.77 = 239,921.29/x
  3. Step 3: Cross multiply
    421,205.77x = 581,196.77 × 239,921.29
  4. Step 4: Simplify right side
    421,205.77x = 139,441,479,228.83
  5. Step 5: Solve for x
    x = 139,441,479,228.83/421,205.77
  6. Step 6: Final answer
    x = 331,053.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.