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Finding the Fourth Proportional to 667,776.40, 921,429.48 and 377,281.96

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Solution

The fourth proportional to 667,776.40, 921,429.48 and 377,281.96 is: 520,591.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,776.40 : 921,429.48 = 377,281.96 : x
  2. Step 2: Convert to fraction form
    667,776.40/921,429.48 = 377,281.96/x
  3. Step 3: Cross multiply
    667,776.40x = 921,429.48 × 377,281.96
  4. Step 4: Simplify right side
    667,776.40x = 347,638,720,216.18
  5. Step 5: Solve for x
    x = 347,638,720,216.18/667,776.40
  6. Step 6: Final answer
    x = 520,591.50

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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.