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Finding the Fourth Proportional to 865,908.90, 1,298,313.16 and 759,506.49

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Solution

The fourth proportional to 865,908.90, 1,298,313.16 and 759,506.49 is: 1,138,777.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,908.90 : 1,298,313.16 = 759,506.49 : x
  2. Step 2: Convert to fraction form
    865,908.90/1,298,313.16 = 759,506.49/x
  3. Step 3: Cross multiply
    865,908.90x = 1,298,313.16 × 759,506.49
  4. Step 4: Simplify right side
    865,908.90x = 986,077,269,173.64
  5. Step 5: Solve for x
    x = 986,077,269,173.64/865,908.90
  6. Step 6: Final answer
    x = 1,138,777.15

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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.