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Finding the Fourth Proportional to 666,355.85, 999,533.03 and 217,076.06

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Solution

The fourth proportional to 666,355.85, 999,533.03 and 217,076.06 is: 325,613.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,355.85 : 999,533.03 = 217,076.06 : x
  2. Step 2: Convert to fraction form
    666,355.85/999,533.03 = 217,076.06/x
  3. Step 3: Cross multiply
    666,355.85x = 999,533.03 × 217,076.06
  4. Step 4: Simplify right side
    666,355.85x = 216,974,685,909.22
  5. Step 5: Solve for x
    x = 216,974,685,909.22/666,355.85
  6. Step 6: Final answer
    x = 325,613.84

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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.