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Finding the Fourth Proportional to 484,388.55, 668,548.71 and 320,756.63

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Solution

The fourth proportional to 484,388.55, 668,548.71 and 320,756.63 is: 442,705.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,388.55 : 668,548.71 = 320,756.63 : x
  2. Step 2: Convert to fraction form
    484,388.55/668,548.71 = 320,756.63/x
  3. Step 3: Cross multiply
    484,388.55x = 668,548.71 × 320,756.63
  4. Step 4: Simplify right side
    484,388.55x = 214,441,427,867.70
  5. Step 5: Solve for x
    x = 214,441,427,867.70/484,388.55
  6. Step 6: Final answer
    x = 442,705.40

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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.