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Finding the Fourth Proportional to 666,847.62, 920,191.32 and 376,443.18

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Solution

The fourth proportional to 666,847.62, 920,191.32 and 376,443.18 is: 519,458.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,847.62 : 920,191.32 = 376,443.18 : x
  2. Step 2: Convert to fraction form
    666,847.62/920,191.32 = 376,443.18/x
  3. Step 3: Cross multiply
    666,847.62x = 920,191.32 × 376,443.18
  4. Step 4: Simplify right side
    666,847.62x = 346,399,746,709.20
  5. Step 5: Solve for x
    x = 346,399,746,709.20/666,847.62
  6. Step 6: Final answer
    x = 519,458.62

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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.