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Finding the Fourth Proportional to 216,947.20, 325,420.80 and 214,978.90

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Solution

The fourth proportional to 216,947.20, 325,420.80 and 214,978.90 is: 322,468.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,947.20 : 325,420.80 = 214,978.90 : x
  2. Step 2: Convert to fraction form
    216,947.20/325,420.80 = 214,978.90/x
  3. Step 3: Cross multiply
    216,947.20x = 325,420.80 × 214,978.90
  4. Step 4: Simplify right side
    216,947.20x = 69,958,605,621.12
  5. Step 5: Solve for x
    x = 69,958,605,621.12/216,947.20
  6. Step 6: Final answer
    x = 322,468.35

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1.5x scale

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.