Home / 678,689.62-1,018,165.65-257,932.69

Finding the Fourth Proportional to 678,689.62, 1,018,165.65 and 257,932.69

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Solution

The fourth proportional to 678,689.62, 1,018,165.65 and 257,932.69 is: 386,948.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,689.62 : 1,018,165.65 = 257,932.69 : x
  2. Step 2: Convert to fraction form
    678,689.62/1,018,165.65 = 257,932.69/x
  3. Step 3: Cross multiply
    678,689.62x = 1,018,165.65 × 257,932.69
  4. Step 4: Simplify right side
    678,689.62x = 262,618,201,457.44
  5. Step 5: Solve for x
    x = 262,618,201,457.44/678,689.62
  6. Step 6: Final answer
    x = 386,948.90

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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.