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Finding the Fourth Proportional to 320,775.50, 442,786.84 and 186,639.50

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Solution

The fourth proportional to 320,775.50, 442,786.84 and 186,639.50 is: 257,630.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,775.50 : 442,786.84 = 186,639.50 : x
  2. Step 2: Convert to fraction form
    320,775.50/442,786.84 = 186,639.50/x
  3. Step 3: Cross multiply
    320,775.50x = 442,786.84 × 186,639.50
  4. Step 4: Simplify right side
    320,775.50x = 82,641,514,424.18
  5. Step 5: Solve for x
    x = 82,641,514,424.18/320,775.50
  6. Step 6: Final answer
    x = 257,630.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.