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Finding the Fourth Proportional to 666,443.48, 919,689.22 and 360,519.11

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Solution

The fourth proportional to 666,443.48, 919,689.22 and 360,519.11 is: 497,514.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,443.48 : 919,689.22 = 360,519.11 : x
  2. Step 2: Convert to fraction form
    666,443.48/919,689.22 = 360,519.11/x
  3. Step 3: Cross multiply
    666,443.48x = 919,689.22 × 360,519.11
  4. Step 4: Simplify right side
    666,443.48x = 331,565,539,070.99
  5. Step 5: Solve for x
    x = 331,565,539,070.99/666,443.48
  6. Step 6: Final answer
    x = 497,514.87

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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.