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Finding the Fourth Proportional to 330,010.55, 455,421.80 and 186,770.69

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Solution

The fourth proportional to 330,010.55, 455,421.80 and 186,770.69 is: 257,747.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,010.55 : 455,421.80 = 186,770.69 : x
  2. Step 2: Convert to fraction form
    330,010.55/455,421.80 = 186,770.69/x
  3. Step 3: Cross multiply
    330,010.55x = 455,421.80 × 186,770.69
  4. Step 4: Simplify right side
    330,010.55x = 85,059,443,827.04
  5. Step 5: Solve for x
    x = 85,059,443,827.04/330,010.55
  6. Step 6: Final answer
    x = 257,747.65

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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.