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Finding the Fourth Proportional to 256,511.80, 384,804.15 and 79,000.30

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Solution

The fourth proportional to 256,511.80, 384,804.15 and 79,000.30 is: 118,511.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,511.80 : 384,804.15 = 79,000.30 : x
  2. Step 2: Convert to fraction form
    256,511.80/384,804.15 = 79,000.30/x
  3. Step 3: Cross multiply
    256,511.80x = 384,804.15 × 79,000.30
  4. Step 4: Simplify right side
    256,511.80x = 30,399,643,291.25
  5. Step 5: Solve for x
    x = 30,399,643,291.25/256,511.80
  6. Step 6: Final answer
    x = 118,511.68

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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.