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Finding the Fourth Proportional to 553,732.48, 764,319.68 and 321,218.16

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Solution

The fourth proportional to 553,732.48, 764,319.68 and 321,218.16 is: 443,379.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,732.48 : 764,319.68 = 321,218.16 : x
  2. Step 2: Convert to fraction form
    553,732.48/764,319.68 = 321,218.16/x
  3. Step 3: Cross multiply
    553,732.48x = 764,319.68 × 321,218.16
  4. Step 4: Simplify right side
    553,732.48x = 245,513,361,261.39
  5. Step 5: Solve for x
    x = 245,513,361,261.39/553,732.48
  6. Step 6: Final answer
    x = 443,379.01

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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.