Home / 678,740.80-1,018,226.40-205,422.40

Finding the Fourth Proportional to 678,740.80, 1,018,226.40 and 205,422.40

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Solution

The fourth proportional to 678,740.80, 1,018,226.40 and 205,422.40 is: 308,168.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,740.80 : 1,018,226.40 = 205,422.40 : x
  2. Step 2: Convert to fraction form
    678,740.80/1,018,226.40 = 205,422.40/x
  3. Step 3: Cross multiply
    678,740.80x = 1,018,226.40 × 205,422.40
  4. Step 4: Simplify right side
    678,740.80x = 209,166,510,831.36
  5. Step 5: Solve for x
    x = 209,166,510,831.36/678,740.80
  6. Step 6: Final answer
    x = 308,168.47

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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.