Home / 678,543.80-1,017,815.70-412,825.40

Finding the Fourth Proportional to 678,543.80, 1,017,815.70 and 412,825.40

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Solution

The fourth proportional to 678,543.80, 1,017,815.70 and 412,825.40 is: 619,238.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,543.80 : 1,017,815.70 = 412,825.40 : x
  2. Step 2: Convert to fraction form
    678,543.80/1,017,815.70 = 412,825.40/x
  3. Step 3: Cross multiply
    678,543.80x = 1,017,815.70 × 412,825.40
  4. Step 4: Simplify right side
    678,543.80x = 420,180,173,478.78
  5. Step 5: Solve for x
    x = 420,180,173,478.78/678,543.80
  6. Step 6: Final answer
    x = 619,238.10

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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.