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Finding the Fourth Proportional to 710,858.28, 981,010.80 and 388,590.24

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Solution

The fourth proportional to 710,858.28, 981,010.80 and 388,590.24 is: 536,268.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,858.28 : 981,010.80 = 388,590.24 : x
  2. Step 2: Convert to fraction form
    710,858.28/981,010.80 = 388,590.24/x
  3. Step 3: Cross multiply
    710,858.28x = 981,010.80 × 388,590.24
  4. Step 4: Simplify right side
    710,858.28x = 381,211,222,214.59
  5. Step 5: Solve for x
    x = 381,211,222,214.59/710,858.28
  6. Step 6: Final answer
    x = 536,268.95

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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.