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Finding the Fourth Proportional to 399,036.94, 550,668.76 and 217,748.32

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Solution

The fourth proportional to 399,036.94, 550,668.76 and 217,748.32 is: 300,491.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,036.94 : 550,668.76 = 217,748.32 : x
  2. Step 2: Convert to fraction form
    399,036.94/550,668.76 = 217,748.32/x
  3. Step 3: Cross multiply
    399,036.94x = 550,668.76 × 217,748.32
  4. Step 4: Simplify right side
    399,036.94x = 119,907,197,366.48
  5. Step 5: Solve for x
    x = 119,907,197,366.48/399,036.94
  6. Step 6: Final answer
    x = 300,491.47

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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.