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Finding the Fourth Proportional to 669,076.42, 923,339.18 and 378,687.98

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Solution

The fourth proportional to 669,076.42, 923,339.18 and 378,687.98 is: 522,597.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,076.42 : 923,339.18 = 378,687.98 : x
  2. Step 2: Convert to fraction form
    669,076.42/923,339.18 = 378,687.98/x
  3. Step 3: Cross multiply
    669,076.42x = 923,339.18 × 378,687.98
  4. Step 4: Simplify right side
    669,076.42x = 349,657,448,929.06
  5. Step 5: Solve for x
    x = 349,657,448,929.06/669,076.42
  6. Step 6: Final answer
    x = 522,597.18

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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.