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Finding the Fourth Proportional to 321,870.60, 482,892.30 and 287,051.40

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Solution

The fourth proportional to 321,870.60, 482,892.30 and 287,051.40 is: 430,654.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,870.60 : 482,892.30 = 287,051.40 : x
  2. Step 2: Convert to fraction form
    321,870.60/482,892.30 = 287,051.40/x
  3. Step 3: Cross multiply
    321,870.60x = 482,892.30 × 287,051.40
  4. Step 4: Simplify right side
    321,870.60x = 138,614,910,764.22
  5. Step 5: Solve for x
    x = 138,614,910,764.22/321,870.60
  6. Step 6: Final answer
    x = 430,654.15

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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.