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Finding the Fourth Proportional to 669,149.68, 923,307.40 and 378,759.84

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Solution

The fourth proportional to 669,149.68, 923,307.40 and 378,759.84 is: 522,621.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,149.68 : 923,307.40 = 378,759.84 : x
  2. Step 2: Convert to fraction form
    669,149.68/923,307.40 = 378,759.84/x
  3. Step 3: Cross multiply
    669,149.68x = 923,307.40 × 378,759.84
  4. Step 4: Simplify right side
    669,149.68x = 349,711,763,094.82
  5. Step 5: Solve for x
    x = 349,711,763,094.82/669,149.68
  6. Step 6: Final answer
    x = 522,621.13

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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.