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Finding the Fourth Proportional to 630,555.60, 869,939.27 and 485,405.76

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Solution

The fourth proportional to 630,555.60, 869,939.27 and 485,405.76 is: 669,684.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,555.60 : 869,939.27 = 485,405.76 : x
  2. Step 2: Convert to fraction form
    630,555.60/869,939.27 = 485,405.76/x
  3. Step 3: Cross multiply
    630,555.60x = 869,939.27 × 485,405.76
  4. Step 4: Simplify right side
    630,555.60x = 422,273,532,508.20
  5. Step 5: Solve for x
    x = 422,273,532,508.20/630,555.60
  6. Step 6: Final answer
    x = 669,684.85

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.