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Finding the Fourth Proportional to 390,383.66, 538,514.25 and 269,588.36

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Solution

The fourth proportional to 390,383.66, 538,514.25 and 269,588.36 is: 371,883.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,383.66 : 538,514.25 = 269,588.36 : x
  2. Step 2: Convert to fraction form
    390,383.66/538,514.25 = 269,588.36/x
  3. Step 3: Cross multiply
    390,383.66x = 538,514.25 × 269,588.36
  4. Step 4: Simplify right side
    390,383.66x = 145,177,173,494.13
  5. Step 5: Solve for x
    x = 145,177,173,494.13/390,383.66
  6. Step 6: Final answer
    x = 371,883.32

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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.