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Finding the Fourth Proportional to 499,653.32, 689,588.28 and 281,906.69

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Solution

The fourth proportional to 499,653.32, 689,588.28 and 281,906.69 is: 389,068.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,653.32 : 689,588.28 = 281,906.69 : x
  2. Step 2: Convert to fraction form
    499,653.32/689,588.28 = 281,906.69/x
  3. Step 3: Cross multiply
    499,653.32x = 689,588.28 × 281,906.69
  4. Step 4: Simplify right side
    499,653.32x = 194,399,549,477.59
  5. Step 5: Solve for x
    x = 194,399,549,477.59/499,653.32
  6. Step 6: Final answer
    x = 389,068.86

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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.