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Finding the Fourth Proportional to 390,231.48, 538,518.24 and 220,465.56

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Solution

The fourth proportional to 390,231.48, 538,518.24 and 220,465.56 is: 304,241.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,231.48 : 538,518.24 = 220,465.56 : x
  2. Step 2: Convert to fraction form
    390,231.48/538,518.24 = 220,465.56/x
  3. Step 3: Cross multiply
    390,231.48x = 538,518.24 × 220,465.56
  4. Step 4: Simplify right side
    390,231.48x = 118,724,725,351.81
  5. Step 5: Solve for x
    x = 118,724,725,351.81/390,231.48
  6. Step 6: Final answer
    x = 304,241.79

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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.