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Finding the Fourth Proportional to 716,598.32, 988,876.03 and 389,912.68

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Solution

The fourth proportional to 716,598.32, 988,876.03 and 389,912.68 is: 538,063.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,598.32 : 988,876.03 = 389,912.68 : x
  2. Step 2: Convert to fraction form
    716,598.32/988,876.03 = 389,912.68/x
  3. Step 3: Cross multiply
    716,598.32x = 988,876.03 × 389,912.68
  4. Step 4: Simplify right side
    716,598.32x = 385,575,297,125.90
  5. Step 5: Solve for x
    x = 385,575,297,125.90/716,598.32
  6. Step 6: Final answer
    x = 538,063.36

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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.