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Finding the Fourth Proportional to 663,090.60, 993,464.70 and 641,164.20

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Solution

The fourth proportional to 663,090.60, 993,464.70 and 641,164.20 is: 960,613.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,090.60 : 993,464.70 = 641,164.20 : x
  2. Step 2: Convert to fraction form
    663,090.60/993,464.70 = 641,164.20/x
  3. Step 3: Cross multiply
    663,090.60x = 993,464.70 × 641,164.20
  4. Step 4: Simplify right side
    663,090.60x = 636,973,999,603.74
  5. Step 5: Solve for x
    x = 636,973,999,603.74/663,090.60
  6. Step 6: Final answer
    x = 960,613.83

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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.