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Finding the Fourth Proportional to 325,614.60, 488,421.90 and 219,326.40

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Solution

The fourth proportional to 325,614.60, 488,421.90 and 219,326.40 is: 328,989.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,614.60 : 488,421.90 = 219,326.40 : x
  2. Step 2: Convert to fraction form
    325,614.60/488,421.90 = 219,326.40/x
  3. Step 3: Cross multiply
    325,614.60x = 488,421.90 × 219,326.40
  4. Step 4: Simplify right side
    325,614.60x = 107,123,817,008.16
  5. Step 5: Solve for x
    x = 107,123,817,008.16/325,614.60
  6. Step 6: Final answer
    x = 328,989.60

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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.