Home / 678,810.42-1,018,436.76-323,778.24

Finding the Fourth Proportional to 678,810.42, 1,018,436.76 and 323,778.24

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Solution

The fourth proportional to 678,810.42, 1,018,436.76 and 323,778.24 is: 485,772.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,810.42 : 1,018,436.76 = 323,778.24 : x
  2. Step 2: Convert to fraction form
    678,810.42/1,018,436.76 = 323,778.24/x
  3. Step 3: Cross multiply
    678,810.42x = 1,018,436.76 × 323,778.24
  4. Step 4: Simplify right side
    678,810.42x = 329,747,661,704.10
  5. Step 5: Solve for x
    x = 329,747,661,704.10/678,810.42
  6. Step 6: Final answer
    x = 485,772.83

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1.5x scale

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.