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Finding the Fourth Proportional to 658,998.80, 989,664.60 and 509,602.40

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Solution

The fourth proportional to 658,998.80, 989,664.60 and 509,602.40 is: 765,305.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,998.80 : 989,664.60 = 509,602.40 : x
  2. Step 2: Convert to fraction form
    658,998.80/989,664.60 = 509,602.40/x
  3. Step 3: Cross multiply
    658,998.80x = 989,664.60 × 509,602.40
  4. Step 4: Simplify right side
    658,998.80x = 504,335,455,355.04
  5. Step 5: Solve for x
    x = 504,335,455,355.04/658,998.80
  6. Step 6: Final answer
    x = 765,305.57

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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.