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Finding the Fourth Proportional to 659,140.80, 989,877.60 and 509,744.40

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Solution

The fourth proportional to 659,140.80, 989,877.60 and 509,744.40 is: 765,518.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,140.80 : 989,877.60 = 509,744.40 : x
  2. Step 2: Convert to fraction form
    659,140.80/989,877.60 = 509,744.40/x
  3. Step 3: Cross multiply
    659,140.80x = 989,877.60 × 509,744.40
  4. Step 4: Simplify right side
    659,140.80x = 504,584,563,285.44
  5. Step 5: Solve for x
    x = 504,584,563,285.44/659,140.80
  6. Step 6: Final answer
    x = 765,518.63

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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.