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Finding the Fourth Proportional to 660,290.38, 990,773.34 and 314,465.38

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Solution

The fourth proportional to 660,290.38, 990,773.34 and 314,465.38 is: 471,858.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,290.38 : 990,773.34 = 314,465.38 : x
  2. Step 2: Convert to fraction form
    660,290.38/990,773.34 = 314,465.38/x
  3. Step 3: Cross multiply
    660,290.38x = 990,773.34 × 314,465.38
  4. Step 4: Simplify right side
    660,290.38x = 311,563,914,856.97
  5. Step 5: Solve for x
    x = 311,563,914,856.97/660,290.38
  6. Step 6: Final answer
    x = 471,858.93

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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.