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Finding the Fourth Proportional to 390,133.56, 538,616.34 and 247,016.28

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Solution

The fourth proportional to 390,133.56, 538,616.34 and 247,016.28 is: 341,029.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,133.56 : 538,616.34 = 247,016.28 : x
  2. Step 2: Convert to fraction form
    390,133.56/538,616.34 = 247,016.28/x
  3. Step 3: Cross multiply
    390,133.56x = 538,616.34 × 247,016.28
  4. Step 4: Simplify right side
    390,133.56x = 133,047,004,654.02
  5. Step 5: Solve for x
    x = 133,047,004,654.02/390,133.56
  6. Step 6: Final answer
    x = 341,029.38

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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.