Home / 678,887.20-1,018,986.90-413,166.70

Finding the Fourth Proportional to 678,887.20, 1,018,986.90 and 413,166.70

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Solution

The fourth proportional to 678,887.20, 1,018,986.90 and 413,166.70 is: 620,149.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,887.20 : 1,018,986.90 = 413,166.70 : x
  2. Step 2: Convert to fraction form
    678,887.20/1,018,986.90 = 413,166.70/x
  3. Step 3: Cross multiply
    678,887.20x = 1,018,986.90 × 413,166.70
  4. Step 4: Simplify right side
    678,887.20x = 421,011,454,816.23
  5. Step 5: Solve for x
    x = 421,011,454,816.23/678,887.20
  6. Step 6: Final answer
    x = 620,149.35

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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.