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Finding the Fourth Proportional to 666,680.68, 920,107.38 and 376,350.76

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Solution

The fourth proportional to 666,680.68, 920,107.38 and 376,350.76 is: 519,413.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,680.68 : 920,107.38 = 376,350.76 : x
  2. Step 2: Convert to fraction form
    666,680.68/920,107.38 = 376,350.76/x
  3. Step 3: Cross multiply
    666,680.68x = 920,107.38 × 376,350.76
  4. Step 4: Simplify right side
    666,680.68x = 346,283,111,744.61
  5. Step 5: Solve for x
    x = 346,283,111,744.61/666,680.68
  6. Step 6: Final answer
    x = 519,413.75

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1.5x scale

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.