Home / 387,972.63-535,226.31-280,372.23

Finding the Fourth Proportional to 387,972.63, 535,226.31 and 280,372.23

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Solution

The fourth proportional to 387,972.63, 535,226.31 and 280,372.23 is: 386,786.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,972.63 : 535,226.31 = 280,372.23 : x
  2. Step 2: Convert to fraction form
    387,972.63/535,226.31 = 280,372.23/x
  3. Step 3: Cross multiply
    387,972.63x = 535,226.31 × 280,372.23
  4. Step 4: Simplify right side
    387,972.63x = 150,062,594,089.37
  5. Step 5: Solve for x
    x = 150,062,594,089.37/387,972.63
  6. Step 6: Final answer
    x = 386,786.55

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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.