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Finding the Fourth Proportional to 718,990.34, 992,566.20 and 447,145.81

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Solution

The fourth proportional to 718,990.34, 992,566.20 and 447,145.81 is: 617,284.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,990.34 : 992,566.20 = 447,145.81 : x
  2. Step 2: Convert to fraction form
    718,990.34/992,566.20 = 447,145.81/x
  3. Step 3: Cross multiply
    718,990.34x = 992,566.20 × 447,145.81
  4. Step 4: Simplify right side
    718,990.34x = 443,821,816,673.00
  5. Step 5: Solve for x
    x = 443,821,816,673.00/718,990.34
  6. Step 6: Final answer
    x = 617,284.82

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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.