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Finding the Fourth Proportional to 317,879.20, 438,566.30 and 180,039.32

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Solution

The fourth proportional to 317,879.20, 438,566.30 and 180,039.32 is: 248,393.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,879.20 : 438,566.30 = 180,039.32 : x
  2. Step 2: Convert to fraction form
    317,879.20/438,566.30 = 180,039.32/x
  3. Step 3: Cross multiply
    317,879.20x = 438,566.30 × 180,039.32
  4. Step 4: Simplify right side
    317,879.20x = 78,959,178,426.92
  5. Step 5: Solve for x
    x = 78,959,178,426.92/317,879.20
  6. Step 6: Final answer
    x = 248,393.66

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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.