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Finding the Fourth Proportional to 716,940.32, 988,825.02 and 445,169.12

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Solution

The fourth proportional to 716,940.32, 988,825.02 and 445,169.12 is: 613,990.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,940.32 : 988,825.02 = 445,169.12 : x
  2. Step 2: Convert to fraction form
    716,940.32/988,825.02 = 445,169.12/x
  3. Step 3: Cross multiply
    716,940.32x = 988,825.02 × 445,169.12
  4. Step 4: Simplify right side
    716,940.32x = 440,194,363,987.38
  5. Step 5: Solve for x
    x = 440,194,363,987.38/716,940.32
  6. Step 6: Final answer
    x = 613,990.25

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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.