Home / 665,432.10-996,835.95-398,399.40

Finding the Fourth Proportional to 665,432.10, 996,835.95 and 398,399.40

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Solution

The fourth proportional to 665,432.10, 996,835.95 and 398,399.40 is: 596,813.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,432.10 : 996,835.95 = 398,399.40 : x
  2. Step 2: Convert to fraction form
    665,432.10/996,835.95 = 398,399.40/x
  3. Step 3: Cross multiply
    665,432.10x = 996,835.95 × 398,399.40
  4. Step 4: Simplify right side
    665,432.10x = 397,138,844,378.43
  5. Step 5: Solve for x
    x = 397,138,844,378.43/665,432.10
  6. Step 6: Final answer
    x = 596,813.48

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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.