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Finding the Fourth Proportional to 763,137.40, 1,053,179.40 and 440,861.08

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Solution

The fourth proportional to 763,137.40, 1,053,179.40 and 440,861.08 is: 608,417.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,137.40 : 1,053,179.40 = 440,861.08 : x
  2. Step 2: Convert to fraction form
    763,137.40/1,053,179.40 = 440,861.08/x
  3. Step 3: Cross multiply
    763,137.40x = 1,053,179.40 × 440,861.08
  4. Step 4: Simplify right side
    763,137.40x = 464,305,807,717.75
  5. Step 5: Solve for x
    x = 464,305,807,717.75/763,137.40
  6. Step 6: Final answer
    x = 608,417.05

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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.