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Finding the Fourth Proportional to 423,121.32, 633,709.98 and 355,703.40

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Solution

The fourth proportional to 423,121.32, 633,709.98 and 355,703.40 is: 532,737.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,121.32 : 633,709.98 = 355,703.40 : x
  2. Step 2: Convert to fraction form
    423,121.32/633,709.98 = 355,703.40/x
  3. Step 3: Cross multiply
    423,121.32x = 633,709.98 × 355,703.40
  4. Step 4: Simplify right side
    423,121.32x = 225,412,794,499.93
  5. Step 5: Solve for x
    x = 225,412,794,499.93/423,121.32
  6. Step 6: Final answer
    x = 532,737.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.