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Finding the Fourth Proportional to 660,471.12, 911,455.20 and 358,665.12

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Solution

The fourth proportional to 660,471.12, 911,455.20 and 358,665.12 is: 494,960.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,471.12 : 911,455.20 = 358,665.12 : x
  2. Step 2: Convert to fraction form
    660,471.12/911,455.20 = 358,665.12/x
  3. Step 3: Cross multiply
    660,471.12x = 911,455.20 × 358,665.12
  4. Step 4: Simplify right side
    660,471.12x = 326,907,188,682.62
  5. Step 5: Solve for x
    x = 326,907,188,682.62/660,471.12
  6. Step 6: Final answer
    x = 494,960.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.