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Finding the Fourth Proportional to 553,613.50, 763,986.64 and 298,964.69

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Solution

The fourth proportional to 553,613.50, 763,986.64 and 298,964.69 is: 412,571.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,613.50 : 763,986.64 = 298,964.69 : x
  2. Step 2: Convert to fraction form
    553,613.50/763,986.64 = 298,964.69/x
  3. Step 3: Cross multiply
    553,613.50x = 763,986.64 × 298,964.69
  4. Step 4: Simplify right side
    553,613.50x = 228,405,028,991.74
  5. Step 5: Solve for x
    x = 228,405,028,991.74/553,613.50
  6. Step 6: Final answer
    x = 412,571.28

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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.