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Finding the Fourth Proportional to 390,606.77, 538,973.60 and 227,299.84

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Solution

The fourth proportional to 390,606.77, 538,973.60 and 227,299.84 is: 313,636.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,606.77 : 538,973.60 = 227,299.84 : x
  2. Step 2: Convert to fraction form
    390,606.77/538,973.60 = 227,299.84/x
  3. Step 3: Cross multiply
    390,606.77x = 538,973.60 × 227,299.84
  4. Step 4: Simplify right side
    390,606.77x = 122,508,610,560.29
  5. Step 5: Solve for x
    x = 122,508,610,560.29/390,606.77
  6. Step 6: Final answer
    x = 313,636.68

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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.