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Finding the Fourth Proportional to 660,155.17, 990,115.71 and 300,241.72

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Solution

The fourth proportional to 660,155.17, 990,115.71 and 300,241.72 is: 450,309.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,155.17 : 990,115.71 = 300,241.72 : x
  2. Step 2: Convert to fraction form
    660,155.17/990,115.71 = 300,241.72/x
  3. Step 3: Cross multiply
    660,155.17x = 990,115.71 × 300,241.72
  4. Step 4: Simplify right side
    660,155.17x = 297,274,043,881.16
  5. Step 5: Solve for x
    x = 297,274,043,881.16/660,155.17
  6. Step 6: Final answer
    x = 450,309.35

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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.