Home / 398,211.90-597,300.45-128,334.05

Finding the Fourth Proportional to 398,211.90, 597,300.45 and 128,334.05

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Solution

The fourth proportional to 398,211.90, 597,300.45 and 128,334.05 is: 192,495.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,211.90 : 597,300.45 = 128,334.05 : x
  2. Step 2: Convert to fraction form
    398,211.90/597,300.45 = 128,334.05/x
  3. Step 3: Cross multiply
    398,211.90x = 597,300.45 × 128,334.05
  4. Step 4: Simplify right side
    398,211.90x = 76,653,985,815.32
  5. Step 5: Solve for x
    x = 76,653,985,815.32/398,211.90
  6. Step 6: Final answer
    x = 192,495.47

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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.