Home / 387,921.53-535,338.24-215,853.23

Finding the Fourth Proportional to 387,921.53, 535,338.24 and 215,853.23

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Solution

The fourth proportional to 387,921.53, 535,338.24 and 215,853.23 is: 297,881.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,921.53 : 535,338.24 = 215,853.23 : x
  2. Step 2: Convert to fraction form
    387,921.53/535,338.24 = 215,853.23/x
  3. Step 3: Cross multiply
    387,921.53x = 535,338.24 × 215,853.23
  4. Step 4: Simplify right side
    387,921.53x = 115,554,488,246.52
  5. Step 5: Solve for x
    x = 115,554,488,246.52/387,921.53
  6. Step 6: Final answer
    x = 297,881.09

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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.