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Finding the Fourth Proportional to 639,467.76, 882,472.80 and 352,987.92

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Solution

The fourth proportional to 639,467.76, 882,472.80 and 352,987.92 is: 487,127.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,467.76 : 882,472.80 = 352,987.92 : x
  2. Step 2: Convert to fraction form
    639,467.76/882,472.80 = 352,987.92/x
  3. Step 3: Cross multiply
    639,467.76x = 882,472.80 × 352,987.92
  4. Step 4: Simplify right side
    639,467.76x = 311,502,238,128.58
  5. Step 5: Solve for x
    x = 311,502,238,128.58/639,467.76
  6. Step 6: Final answer
    x = 487,127.35

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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.