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Finding the Fourth Proportional to 716,598.48, 988,876.24 and 389,912.83

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Solution

The fourth proportional to 716,598.48, 988,876.24 and 389,912.83 is: 538,063.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,598.48 : 988,876.24 = 389,912.83 : x
  2. Step 2: Convert to fraction form
    716,598.48/988,876.24 = 389,912.83/x
  3. Step 3: Cross multiply
    716,598.48x = 988,876.24 × 389,912.83
  4. Step 4: Simplify right side
    716,598.48x = 385,575,534,981.65
  5. Step 5: Solve for x
    x = 385,575,534,981.65/716,598.48
  6. Step 6: Final answer
    x = 538,063.57

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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.