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Finding the Fourth Proportional to 316,455.90, 436,721.15 and 180,511.98

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Solution

The fourth proportional to 316,455.90, 436,721.15 and 180,511.98 is: 249,113.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,455.90 : 436,721.15 = 180,511.98 : x
  2. Step 2: Convert to fraction form
    316,455.90/436,721.15 = 180,511.98/x
  3. Step 3: Cross multiply
    316,455.90x = 436,721.15 × 180,511.98
  4. Step 4: Simplify right side
    316,455.90x = 78,833,399,945.66
  5. Step 5: Solve for x
    x = 78,833,399,945.66/316,455.90
  6. Step 6: Final answer
    x = 249,113.38

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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.