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Finding the Fourth Proportional to 666,736.88, 920,113.10 and 380,283.62

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Solution

The fourth proportional to 666,736.88, 920,113.10 and 380,283.62 is: 524,800.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,736.88 : 920,113.10 = 380,283.62 : x
  2. Step 2: Convert to fraction form
    666,736.88/920,113.10 = 380,283.62/x
  3. Step 3: Cross multiply
    666,736.88x = 920,113.10 × 380,283.62
  4. Step 4: Simplify right side
    666,736.88x = 349,903,940,477.42
  5. Step 5: Solve for x
    x = 349,903,940,477.42/666,736.88
  6. Step 6: Final answer
    x = 524,800.64

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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.