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Finding the Fourth Proportional to 445,888.98, 668,898.90 and 209,255.58

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Solution

The fourth proportional to 445,888.98, 668,898.90 and 209,255.58 is: 313,914.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,888.98 : 668,898.90 = 209,255.58 : x
  2. Step 2: Convert to fraction form
    445,888.98/668,898.90 = 209,255.58/x
  3. Step 3: Cross multiply
    445,888.98x = 668,898.90 × 209,255.58
  4. Step 4: Simplify right side
    445,888.98x = 139,970,827,280.86
  5. Step 5: Solve for x
    x = 139,970,827,280.86/445,888.98
  6. Step 6: Final answer
    x = 313,914.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.