Home / 678,421.80-1,017,780.30-205,094.79

Finding the Fourth Proportional to 678,421.80, 1,017,780.30 and 205,094.79

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Solution

The fourth proportional to 678,421.80, 1,017,780.30 and 205,094.79 is: 307,686.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,421.80 : 1,017,780.30 = 205,094.79 : x
  2. Step 2: Convert to fraction form
    678,421.80/1,017,780.30 = 205,094.79/x
  3. Step 3: Cross multiply
    678,421.80x = 1,017,780.30 × 205,094.79
  4. Step 4: Simplify right side
    678,421.80x = 208,741,436,894.64
  5. Step 5: Solve for x
    x = 208,741,436,894.64/678,421.80
  6. Step 6: Final answer
    x = 307,686.81

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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.