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Finding the Fourth Proportional to 642,802.08, 886,973.64 and 356,322

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Solution

The fourth proportional to 642,802.08, 886,973.64 and 356,322 is: 491,672.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,802.08 : 886,973.64 = 356,322 : x
  2. Step 2: Convert to fraction form
    642,802.08/886,973.64 = 356,322/x
  3. Step 3: Cross multiply
    642,802.08x = 886,973.64 × 356,322
  4. Step 4: Simplify right side
    642,802.08x = 316,048,221,352.08
  5. Step 5: Solve for x
    x = 316,048,221,352.08/642,802.08
  6. Step 6: Final answer
    x = 491,672.68

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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.