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Finding the Fourth Proportional to 393,133.52, 589,720.44 and 112,653.20

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Solution

The fourth proportional to 393,133.52, 589,720.44 and 112,653.20 is: 168,985.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,133.52 : 589,720.44 = 112,653.20 : x
  2. Step 2: Convert to fraction form
    393,133.52/589,720.44 = 112,653.20/x
  3. Step 3: Cross multiply
    393,133.52x = 589,720.44 × 112,653.20
  4. Step 4: Simplify right side
    393,133.52x = 66,433,894,671.41
  5. Step 5: Solve for x
    x = 66,433,894,671.41/393,133.52
  6. Step 6: Final answer
    x = 168,985.58

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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.