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Finding the Fourth Proportional to 397,930.28, 549,153.65 and 216,652.15

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Solution

The fourth proportional to 397,930.28, 549,153.65 and 216,652.15 is: 298,985.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,930.28 : 549,153.65 = 216,652.15 : x
  2. Step 2: Convert to fraction form
    397,930.28/549,153.65 = 216,652.15/x
  3. Step 3: Cross multiply
    397,930.28x = 549,153.65 × 216,652.15
  4. Step 4: Simplify right side
    397,930.28x = 118,975,319,571.59
  5. Step 5: Solve for x
    x = 118,975,319,571.59/397,930.28
  6. Step 6: Final answer
    x = 298,985.34

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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.