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Finding the Fourth Proportional to 710,978.48, 981,150.84 and 388,683.44

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Solution

The fourth proportional to 710,978.48, 981,150.84 and 388,683.44 is: 536,383.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,978.48 : 981,150.84 = 388,683.44 : x
  2. Step 2: Convert to fraction form
    710,978.48/981,150.84 = 388,683.44/x
  3. Step 3: Cross multiply
    710,978.48x = 981,150.84 × 388,683.44
  4. Step 4: Simplify right side
    710,978.48x = 381,357,083,650.09
  5. Step 5: Solve for x
    x = 381,357,083,650.09/710,978.48
  6. Step 6: Final answer
    x = 536,383.44

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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.