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Finding the Fourth Proportional to 718,114.56, 990,952.96 and 395,806.88

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Solution

The fourth proportional to 718,114.56, 990,952.96 and 395,806.88 is: 546,188.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,114.56 : 990,952.96 = 395,806.88 : x
  2. Step 2: Convert to fraction form
    718,114.56/990,952.96 = 395,806.88/x
  3. Step 3: Cross multiply
    718,114.56x = 990,952.96 × 395,806.88
  4. Step 4: Simplify right side
    718,114.56x = 392,225,999,324.37
  5. Step 5: Solve for x
    x = 392,225,999,324.37/718,114.56
  6. Step 6: Final answer
    x = 546,188.62

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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.