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Finding the Fourth Proportional to 389,882.72, 538,038.96 and 211,034.72

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Solution

The fourth proportional to 389,882.72, 538,038.96 and 211,034.72 is: 291,228.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,882.72 : 538,038.96 = 211,034.72 : x
  2. Step 2: Convert to fraction form
    389,882.72/538,038.96 = 211,034.72/x
  3. Step 3: Cross multiply
    389,882.72x = 538,038.96 × 211,034.72
  4. Step 4: Simplify right side
    389,882.72x = 113,544,901,272.69
  5. Step 5: Solve for x
    x = 113,544,901,272.69/389,882.72
  6. Step 6: Final answer
    x = 291,228.35

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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.