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Finding the Fourth Proportional to 316,030.44, 436,128.30 and 172,799.40

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Solution

The fourth proportional to 316,030.44, 436,128.30 and 172,799.40 is: 238,466.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,030.44 : 436,128.30 = 172,799.40 : x
  2. Step 2: Convert to fraction form
    316,030.44/436,128.30 = 172,799.40/x
  3. Step 3: Cross multiply
    316,030.44x = 436,128.30 × 172,799.40
  4. Step 4: Simplify right side
    316,030.44x = 75,362,708,563.02
  5. Step 5: Solve for x
    x = 75,362,708,563.02/316,030.44
  6. Step 6: Final answer
    x = 238,466.61

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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.