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Finding the Fourth Proportional to 546,571.80, 821,607.30 and 389,885.40

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Solution

The fourth proportional to 546,571.80, 821,607.30 and 389,885.40 is: 586,076.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    546,571.80 : 821,607.30 = 389,885.40 : x
  2. Step 2: Convert to fraction form
    546,571.80/821,607.30 = 389,885.40/x
  3. Step 3: Cross multiply
    546,571.80x = 821,607.30 × 389,885.40
  4. Step 4: Simplify right side
    546,571.80x = 320,332,690,803.42
  5. Step 5: Solve for x
    x = 320,332,690,803.42/546,571.80
  6. Step 6: Final answer
    x = 586,076.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.