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Finding the Fourth Proportional to 309,185.91, 426,688.80 and 173,220.98

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Solution

The fourth proportional to 309,185.91, 426,688.80 and 173,220.98 is: 239,051.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,185.91 : 426,688.80 = 173,220.98 : x
  2. Step 2: Convert to fraction form
    309,185.91/426,688.80 = 173,220.98/x
  3. Step 3: Cross multiply
    309,185.91x = 426,688.80 × 173,220.98
  4. Step 4: Simplify right side
    309,185.91x = 73,911,449,957.58
  5. Step 5: Solve for x
    x = 73,911,449,957.58/309,185.91
  6. Step 6: Final answer
    x = 239,051.81

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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.