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Finding the Fourth Proportional to 330,666.60, 495,999.90 and 172,943.40

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Solution

The fourth proportional to 330,666.60, 495,999.90 and 172,943.40 is: 259,415.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,666.60 : 495,999.90 = 172,943.40 : x
  2. Step 2: Convert to fraction form
    330,666.60/495,999.90 = 172,943.40/x
  3. Step 3: Cross multiply
    330,666.60x = 495,999.90 × 172,943.40
  4. Step 4: Simplify right side
    330,666.60x = 85,779,909,105.66
  5. Step 5: Solve for x
    x = 85,779,909,105.66/330,666.60
  6. Step 6: Final answer
    x = 259,415.10

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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.