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Finding the Fourth Proportional to 666,678.57, 920,018.86 and 360,754.95

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Solution

The fourth proportional to 666,678.57, 920,018.86 and 360,754.95 is: 497,843.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,678.57 : 920,018.86 = 360,754.95 : x
  2. Step 2: Convert to fraction form
    666,678.57/920,018.86 = 360,754.95/x
  3. Step 3: Cross multiply
    666,678.57x = 920,018.86 × 360,754.95
  4. Step 4: Simplify right side
    666,678.57x = 331,901,361,375.67
  5. Step 5: Solve for x
    x = 331,901,361,375.67/666,678.57
  6. Step 6: Final answer
    x = 497,843.15

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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.