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Finding the Fourth Proportional to 455,963.50, 683,945.25 and 123,539.50

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Solution

The fourth proportional to 455,963.50, 683,945.25 and 123,539.50 is: 185,309.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,963.50 : 683,945.25 = 123,539.50 : x
  2. Step 2: Convert to fraction form
    455,963.50/683,945.25 = 123,539.50/x
  3. Step 3: Cross multiply
    455,963.50x = 683,945.25 × 123,539.50
  4. Step 4: Simplify right side
    455,963.50x = 84,494,254,212.38
  5. Step 5: Solve for x
    x = 84,494,254,212.38/455,963.50
  6. Step 6: Final answer
    x = 185,309.25

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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.