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Finding the Fourth Proportional to 620,489.96, 856,182.90 and 348,505.78

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Solution

The fourth proportional to 620,489.96, 856,182.90 and 348,505.78 is: 480,885.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,489.96 : 856,182.90 = 348,505.78 : x
  2. Step 2: Convert to fraction form
    620,489.96/856,182.90 = 348,505.78/x
  3. Step 3: Cross multiply
    620,489.96x = 856,182.90 × 348,505.78
  4. Step 4: Simplify right side
    620,489.96x = 298,384,689,387.16
  5. Step 5: Solve for x
    x = 298,384,689,387.16/620,489.96
  6. Step 6: Final answer
    x = 480,885.60

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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.