Home / 678,272.10-1,017,408.15-639,564.90

Finding the Fourth Proportional to 678,272.10, 1,017,408.15 and 639,564.90

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Solution

The fourth proportional to 678,272.10, 1,017,408.15 and 639,564.90 is: 959,347.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,272.10 : 1,017,408.15 = 639,564.90 : x
  2. Step 2: Convert to fraction form
    678,272.10/1,017,408.15 = 639,564.90/x
  3. Step 3: Cross multiply
    678,272.10x = 1,017,408.15 × 639,564.90
  4. Step 4: Simplify right side
    678,272.10x = 650,698,541,713.94
  5. Step 5: Solve for x
    x = 650,698,541,713.94/678,272.10
  6. Step 6: Final answer
    x = 959,347.35

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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.