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Finding the Fourth Proportional to 616,997.20, 851,499.48 and 345,090.40

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Solution

The fourth proportional to 616,997.20, 851,499.48 and 345,090.40 is: 476,248.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,997.20 : 851,499.48 = 345,090.40 : x
  2. Step 2: Convert to fraction form
    616,997.20/851,499.48 = 345,090.40/x
  3. Step 3: Cross multiply
    616,997.20x = 851,499.48 × 345,090.40
  4. Step 4: Simplify right side
    616,997.20x = 293,844,296,152.99
  5. Step 5: Solve for x
    x = 293,844,296,152.99/616,997.20
  6. Step 6: Final answer
    x = 476,248.99

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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.