Home / 678,986.40-1,018,700.72-323,954.52

Finding the Fourth Proportional to 678,986.40, 1,018,700.72 and 323,954.52

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Solution

The fourth proportional to 678,986.40, 1,018,700.72 and 323,954.52 is: 486,037.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,986.40 : 1,018,700.72 = 323,954.52 : x
  2. Step 2: Convert to fraction form
    678,986.40/1,018,700.72 = 323,954.52/x
  3. Step 3: Cross multiply
    678,986.40x = 1,018,700.72 × 323,954.52
  4. Step 4: Simplify right side
    678,986.40x = 330,012,702,771.25
  5. Step 5: Solve for x
    x = 330,012,702,771.25/678,986.40
  6. Step 6: Final answer
    x = 486,037.28

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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.