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Finding the Fourth Proportional to 660,386.60, 990,579.90 and 161,750.60

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Solution

The fourth proportional to 660,386.60, 990,579.90 and 161,750.60 is: 242,625.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,386.60 : 990,579.90 = 161,750.60 : x
  2. Step 2: Convert to fraction form
    660,386.60/990,579.90 = 161,750.60/x
  3. Step 3: Cross multiply
    660,386.60x = 990,579.90 × 161,750.60
  4. Step 4: Simplify right side
    660,386.60x = 160,226,893,172.94
  5. Step 5: Solve for x
    x = 160,226,893,172.94/660,386.60
  6. Step 6: Final answer
    x = 242,625.90

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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.