Home / 450,451.98-621,623.97-280,686.78

Finding the Fourth Proportional to 450,451.98, 621,623.97 and 280,686.78

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Solution

The fourth proportional to 450,451.98, 621,623.97 and 280,686.78 is: 387,347.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,451.98 : 621,623.97 = 280,686.78 : x
  2. Step 2: Convert to fraction form
    450,451.98/621,623.97 = 280,686.78/x
  3. Step 3: Cross multiply
    450,451.98x = 621,623.97 × 280,686.78
  4. Step 4: Simplify right side
    450,451.98x = 174,481,630,510.12
  5. Step 5: Solve for x
    x = 174,481,630,510.12/450,451.98
  6. Step 6: Final answer
    x = 387,347.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.