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Finding the Fourth Proportional to 716,398.47, 988,590.87 and 394,056.54

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Solution

The fourth proportional to 716,398.47, 988,590.87 and 394,056.54 is: 543,776.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,398.47 : 988,590.87 = 394,056.54 : x
  2. Step 2: Convert to fraction form
    716,398.47/988,590.87 = 394,056.54/x
  3. Step 3: Cross multiply
    716,398.47x = 988,590.87 × 394,056.54
  4. Step 4: Simplify right side
    716,398.47x = 389,560,697,707.79
  5. Step 5: Solve for x
    x = 389,560,697,707.79/716,398.47
  6. Step 6: Final answer
    x = 543,776.56

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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.