Home / 438,933.64-658,423.20-139,437.76

Finding the Fourth Proportional to 438,933.64, 658,423.20 and 139,437.76

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Solution

The fourth proportional to 438,933.64, 658,423.20 and 139,437.76 is: 209,163.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,933.64 : 658,423.20 = 139,437.76 : x
  2. Step 2: Convert to fraction form
    438,933.64/658,423.20 = 139,437.76/x
  3. Step 3: Cross multiply
    438,933.64x = 658,423.20 × 139,437.76
  4. Step 4: Simplify right side
    438,933.64x = 91,809,056,140.03
  5. Step 5: Solve for x
    x = 91,809,056,140.03/438,933.64
  6. Step 6: Final answer
    x = 209,163.86

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1.5x scale

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.