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Finding the Fourth Proportional to 309,615.04, 427,273.64 and 173,679.20

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Solution

The fourth proportional to 309,615.04, 427,273.64 and 173,679.20 is: 239,680.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,615.04 : 427,273.64 = 173,679.20 : x
  2. Step 2: Convert to fraction form
    309,615.04/427,273.64 = 173,679.20/x
  3. Step 3: Cross multiply
    309,615.04x = 427,273.64 × 173,679.20
  4. Step 4: Simplify right side
    309,615.04x = 74,208,543,976.29
  5. Step 5: Solve for x
    x = 74,208,543,976.29/309,615.04
  6. Step 6: Final answer
    x = 239,680.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.