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Finding the Fourth Proportional to 659,643.30, 989,464.95 and 210,360.60

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Solution

The fourth proportional to 659,643.30, 989,464.95 and 210,360.60 is: 315,540.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,643.30 : 989,464.95 = 210,360.60 : x
  2. Step 2: Convert to fraction form
    659,643.30/989,464.95 = 210,360.60/x
  3. Step 3: Cross multiply
    659,643.30x = 989,464.95 × 210,360.60
  4. Step 4: Simplify right side
    659,643.30x = 208,144,440,560.97
  5. Step 5: Solve for x
    x = 208,144,440,560.97/659,643.30
  6. Step 6: Final answer
    x = 315,540.90

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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.