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Finding the Fourth Proportional to 354,666.60, 531,842.40 and 129,968.28

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Solution

The fourth proportional to 354,666.60, 531,842.40 and 129,968.28 is: 194,894.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,666.60 : 531,842.40 = 129,968.28 : x
  2. Step 2: Convert to fraction form
    354,666.60/531,842.40 = 129,968.28/x
  3. Step 3: Cross multiply
    354,666.60x = 531,842.40 × 129,968.28
  4. Step 4: Simplify right side
    354,666.60x = 69,122,641,959.07
  5. Step 5: Solve for x
    x = 69,122,641,959.07/354,666.60
  6. Step 6: Final answer
    x = 194,894.70

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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.