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Finding the Fourth Proportional to 535,857.78, 739,457.01 and 309,489.78

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Solution

The fourth proportional to 535,857.78, 739,457.01 and 309,489.78 is: 427,080.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    535,857.78 : 739,457.01 = 309,489.78 : x
  2. Step 2: Convert to fraction form
    535,857.78/739,457.01 = 309,489.78/x
  3. Step 3: Cross multiply
    535,857.78x = 739,457.01 × 309,489.78
  4. Step 4: Simplify right side
    535,857.78x = 228,854,387,344.36
  5. Step 5: Solve for x
    x = 228,854,387,344.36/535,857.78
  6. Step 6: Final answer
    x = 427,080.46

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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.