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Finding the Fourth Proportional to 716,007.12, 988,056 and 393,730.80

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Solution

The fourth proportional to 716,007.12, 988,056 and 393,730.80 is: 543,329.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,007.12 : 988,056 = 393,730.80 : x
  2. Step 2: Convert to fraction form
    716,007.12/988,056 = 393,730.80/x
  3. Step 3: Cross multiply
    716,007.12x = 988,056 × 393,730.80
  4. Step 4: Simplify right side
    716,007.12x = 389,028,079,324.80
  5. Step 5: Solve for x
    x = 389,028,079,324.80/716,007.12
  6. Step 6: Final answer
    x = 543,329.90

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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.