Home / 678,300.40-1,017,450.60-521,321.20

Finding the Fourth Proportional to 678,300.40, 1,017,450.60 and 521,321.20

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Solution

The fourth proportional to 678,300.40, 1,017,450.60 and 521,321.20 is: 781,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,300.40 : 1,017,450.60 = 521,321.20 : x
  2. Step 2: Convert to fraction form
    678,300.40/1,017,450.60 = 521,321.20/x
  3. Step 3: Cross multiply
    678,300.40x = 1,017,450.60 × 521,321.20
  4. Step 4: Simplify right side
    678,300.40x = 530,418,567,732.72
  5. Step 5: Solve for x
    x = 530,418,567,732.72/678,300.40
  6. Step 6: Final answer
    x = 781,981.80

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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.