Home / 485,220.81-669,607.38-281,392.58

Finding the Fourth Proportional to 485,220.81, 669,607.38 and 281,392.58

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Solution

The fourth proportional to 485,220.81, 669,607.38 and 281,392.58 is: 388,323.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,220.81 : 669,607.38 = 281,392.58 : x
  2. Step 2: Convert to fraction form
    485,220.81/669,607.38 = 281,392.58/x
  3. Step 3: Cross multiply
    485,220.81x = 669,607.38 × 281,392.58
  4. Step 4: Simplify right side
    485,220.81x = 188,422,548,864.04
  5. Step 5: Solve for x
    x = 188,422,548,864.04/485,220.81
  6. Step 6: Final answer
    x = 388,323.30

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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.