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Finding the Fourth Proportional to 659,903.18, 989,842.62 and 210,620.48

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Solution

The fourth proportional to 659,903.18, 989,842.62 and 210,620.48 is: 315,926.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,903.18 : 989,842.62 = 210,620.48 : x
  2. Step 2: Convert to fraction form
    659,903.18/989,842.62 = 210,620.48/x
  3. Step 3: Cross multiply
    659,903.18x = 989,842.62 × 210,620.48
  4. Step 4: Simplify right side
    659,903.18x = 208,481,127,748.86
  5. Step 5: Solve for x
    x = 208,481,127,748.86/659,903.18
  6. Step 6: Final answer
    x = 315,926.84

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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.