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Finding the Fourth Proportional to 499,509.86, 689,391.05 and 281,763.23

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Solution

The fourth proportional to 499,509.86, 689,391.05 and 281,763.23 is: 388,871.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,509.86 : 689,391.05 = 281,763.23 : x
  2. Step 2: Convert to fraction form
    499,509.86/689,391.05 = 281,763.23/x
  3. Step 3: Cross multiply
    499,509.86x = 689,391.05 × 281,763.23
  4. Step 4: Simplify right side
    499,509.86x = 194,245,044,125.32
  5. Step 5: Solve for x
    x = 194,245,044,125.32/499,509.86
  6. Step 6: Final answer
    x = 388,871.29

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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.