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Finding the Fourth Proportional to 660,079.31, 990,332.20 and 305,326.04

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Solution

The fourth proportional to 660,079.31, 990,332.20 and 305,326.04 is: 458,087.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,079.31 : 990,332.20 = 305,326.04 : x
  2. Step 2: Convert to fraction form
    660,079.31/990,332.20 = 305,326.04/x
  3. Step 3: Cross multiply
    660,079.31x = 990,332.20 × 305,326.04
  4. Step 4: Simplify right side
    660,079.31x = 302,374,212,149.63
  5. Step 5: Solve for x
    x = 302,374,212,149.63/660,079.31
  6. Step 6: Final answer
    x = 458,087.70

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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.