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Finding the Fourth Proportional to 666,218.72, 919,379.19 and 360,295.44

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Solution

The fourth proportional to 666,218.72, 919,379.19 and 360,295.44 is: 497,206.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,218.72 : 919,379.19 = 360,295.44 : x
  2. Step 2: Convert to fraction form
    666,218.72/919,379.19 = 360,295.44/x
  3. Step 3: Cross multiply
    666,218.72x = 919,379.19 × 360,295.44
  4. Step 4: Simplify right side
    666,218.72x = 331,248,132,862.84
  5. Step 5: Solve for x
    x = 331,248,132,862.84/666,218.72
  6. Step 6: Final answer
    x = 497,206.28

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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.