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Finding the Fourth Proportional to 666,875.34, 999,810 and 217,327.86

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Solution

The fourth proportional to 666,875.34, 999,810 and 217,327.86 is: 325,827.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,875.34 : 999,810 = 217,327.86 : x
  2. Step 2: Convert to fraction form
    666,875.34/999,810 = 217,327.86/x
  3. Step 3: Cross multiply
    666,875.34x = 999,810 × 217,327.86
  4. Step 4: Simplify right side
    666,875.34x = 217,286,567,706.60
  5. Step 5: Solve for x
    x = 217,286,567,706.60/666,875.34
  6. Step 6: Final answer
    x = 325,827.86

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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.