Home / 398,829.12-598,359.54-128,951.52

Finding the Fourth Proportional to 398,829.12, 598,359.54 and 128,951.52

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Solution

The fourth proportional to 398,829.12, 598,359.54 and 128,951.52 is: 193,464.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,829.12 : 598,359.54 = 128,951.52 : x
  2. Step 2: Convert to fraction form
    398,829.12/598,359.54 = 128,951.52/x
  3. Step 3: Cross multiply
    398,829.12x = 598,359.54 × 128,951.52
  4. Step 4: Simplify right side
    398,829.12x = 77,159,372,189.50
  5. Step 5: Solve for x
    x = 77,159,372,189.50/398,829.12
  6. Step 6: Final answer
    x = 193,464.74

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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.