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Finding the Fourth Proportional to 639,472.63, 882,472.40 and 352,992.91

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Solution

The fourth proportional to 639,472.63, 882,472.40 and 352,992.91 is: 487,130.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,472.63 : 882,472.40 = 352,992.91 : x
  2. Step 2: Convert to fraction form
    639,472.63/882,472.40 = 352,992.91/x
  3. Step 3: Cross multiply
    639,472.63x = 882,472.40 × 352,992.91
  4. Step 4: Simplify right side
    639,472.63x = 311,506,500,470.68
  5. Step 5: Solve for x
    x = 311,506,500,470.68/639,472.63
  6. Step 6: Final answer
    x = 487,130.31

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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.