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Finding the Fourth Proportional to 716,678.60, 988,991.64 and 394,358.52

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Solution

The fourth proportional to 716,678.60, 988,991.64 and 394,358.52 is: 544,201.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,678.60 : 988,991.64 = 394,358.52 : x
  2. Step 2: Convert to fraction form
    716,678.60/988,991.64 = 394,358.52/x
  3. Step 3: Cross multiply
    716,678.60x = 988,991.64 × 394,358.52
  4. Step 4: Simplify right side
    716,678.60x = 390,017,279,442.77
  5. Step 5: Solve for x
    x = 390,017,279,442.77/716,678.60
  6. Step 6: Final answer
    x = 544,201.10

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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.