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Finding the Fourth Proportional to 663,871.50, 916,138.46 and 377,391.60

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Solution

The fourth proportional to 663,871.50, 916,138.46 and 377,391.60 is: 520,798.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,871.50 : 916,138.46 = 377,391.60 : x
  2. Step 2: Convert to fraction form
    663,871.50/916,138.46 = 377,391.60/x
  3. Step 3: Cross multiply
    663,871.50x = 916,138.46 × 377,391.60
  4. Step 4: Simplify right side
    663,871.50x = 345,742,959,240.94
  5. Step 5: Solve for x
    x = 345,742,959,240.94/663,871.50
  6. Step 6: Final answer
    x = 520,798.01

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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.