Home / 398,820.64-598,346.79-128,943.02

Finding the Fourth Proportional to 398,820.64, 598,346.79 and 128,943.02

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Solution

The fourth proportional to 398,820.64, 598,346.79 and 128,943.02 is: 193,451.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,820.64 : 598,346.79 = 128,943.02 : x
  2. Step 2: Convert to fraction form
    398,820.64/598,346.79 = 128,943.02/x
  3. Step 3: Cross multiply
    398,820.64x = 598,346.79 × 128,943.02
  4. Step 4: Simplify right side
    398,820.64x = 77,152,642,109.91
  5. Step 5: Solve for x
    x = 77,152,642,109.91/398,820.64
  6. Step 6: Final answer
    x = 193,451.98

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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.