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Finding the Fourth Proportional to 659,860.46, 989,807.88 and 210,580.73

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Solution

The fourth proportional to 659,860.46, 989,807.88 and 210,580.73 is: 315,876.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,860.46 : 989,807.88 = 210,580.73 : x
  2. Step 2: Convert to fraction form
    659,860.46/989,807.88 = 210,580.73/x
  3. Step 3: Cross multiply
    659,860.46x = 989,807.88 × 210,580.73
  4. Step 4: Simplify right side
    659,860.46x = 208,434,464,877.25
  5. Step 5: Solve for x
    x = 208,434,464,877.25/659,860.46
  6. Step 6: Final answer
    x = 315,876.58

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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.