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Finding the Fourth Proportional to 660,313.78, 911,232.96 and 358,507.78

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Solution

The fourth proportional to 660,313.78, 911,232.96 and 358,507.78 is: 494,740.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,313.78 : 911,232.96 = 358,507.78 : x
  2. Step 2: Convert to fraction form
    660,313.78/911,232.96 = 358,507.78/x
  3. Step 3: Cross multiply
    660,313.78x = 911,232.96 × 358,507.78
  4. Step 4: Simplify right side
    660,313.78x = 326,684,105,552.43
  5. Step 5: Solve for x
    x = 326,684,105,552.43/660,313.78
  6. Step 6: Final answer
    x = 494,740.71

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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.