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Finding the Fourth Proportional to 659,898.30, 989,847.45 and 210,652.05

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Solution

The fourth proportional to 659,898.30, 989,847.45 and 210,652.05 is: 315,978.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,898.30 : 989,847.45 = 210,652.05 : x
  2. Step 2: Convert to fraction form
    659,898.30/989,847.45 = 210,652.05/x
  3. Step 3: Cross multiply
    659,898.30x = 989,847.45 × 210,652.05
  4. Step 4: Simplify right side
    659,898.30x = 208,513,394,529.77
  5. Step 5: Solve for x
    x = 208,513,394,529.77/659,898.30
  6. Step 6: Final answer
    x = 315,978.08

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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.