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Finding the Fourth Proportional to 669,810.72, 924,310.80 and 397,903.44

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Solution

The fourth proportional to 669,810.72, 924,310.80 and 397,903.44 is: 549,090.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,810.72 : 924,310.80 = 397,903.44 : x
  2. Step 2: Convert to fraction form
    669,810.72/924,310.80 = 397,903.44/x
  3. Step 3: Cross multiply
    669,810.72x = 924,310.80 × 397,903.44
  4. Step 4: Simplify right side
    669,810.72x = 367,786,446,949.15
  5. Step 5: Solve for x
    x = 367,786,446,949.15/669,810.72
  6. Step 6: Final answer
    x = 549,090.12

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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.