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Finding the Fourth Proportional to 423,384.78, 637,611.65 and 385,593.42

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Solution

The fourth proportional to 423,384.78, 637,611.65 and 385,593.42 is: 580,698.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,384.78 : 637,611.65 = 385,593.42 : x
  2. Step 2: Convert to fraction form
    423,384.78/637,611.65 = 385,593.42/x
  3. Step 3: Cross multiply
    423,384.78x = 637,611.65 × 385,593.42
  4. Step 4: Simplify right side
    423,384.78x = 245,858,854,827.38
  5. Step 5: Solve for x
    x = 245,858,854,827.38/423,384.78
  6. Step 6: Final answer
    x = 580,698.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.