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Finding the Fourth Proportional to 390,336.08, 538,602.56 and 227,028.72

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Solution

The fourth proportional to 390,336.08, 538,602.56 and 227,028.72 is: 313,264.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,336.08 : 538,602.56 = 227,028.72 : x
  2. Step 2: Convert to fraction form
    390,336.08/538,602.56 = 227,028.72/x
  3. Step 3: Cross multiply
    390,336.08x = 538,602.56 × 227,028.72
  4. Step 4: Simplify right side
    390,336.08x = 122,278,249,785.52
  5. Step 5: Solve for x
    x = 122,278,249,785.52/390,336.08
  6. Step 6: Final answer
    x = 313,264.02

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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.