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Finding the Fourth Proportional to 660,665.60, 990,998.40 and 548,569.70

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Solution

The fourth proportional to 660,665.60, 990,998.40 and 548,569.70 is: 822,854.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,665.60 : 990,998.40 = 548,569.70 : x
  2. Step 2: Convert to fraction form
    660,665.60/990,998.40 = 548,569.70/x
  3. Step 3: Cross multiply
    660,665.60x = 990,998.40 × 548,569.70
  4. Step 4: Simplify right side
    660,665.60x = 543,631,694,988.48
  5. Step 5: Solve for x
    x = 543,631,694,988.48/660,665.60
  6. Step 6: Final answer
    x = 822,854.55

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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.