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Finding the Fourth Proportional to 308,779.60, 462,823.80 and 131,256.40

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Solution

The fourth proportional to 308,779.60, 462,823.80 and 131,256.40 is: 196,737.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,779.60 : 462,823.80 = 131,256.40 : x
  2. Step 2: Convert to fraction form
    308,779.60/462,823.80 = 131,256.40/x
  3. Step 3: Cross multiply
    308,779.60x = 462,823.80 × 131,256.40
  4. Step 4: Simplify right side
    308,779.60x = 60,748,585,822.32
  5. Step 5: Solve for x
    x = 60,748,585,822.32/308,779.60
  6. Step 6: Final answer
    x = 196,737.69

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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.