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Finding the Fourth Proportional to 710,879.03, 981,012.79 and 388,590.35

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Solution

The fourth proportional to 710,879.03, 981,012.79 and 388,590.35 is: 536,254.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,879.03 : 981,012.79 = 388,590.35 : x
  2. Step 2: Convert to fraction form
    710,879.03/981,012.79 = 388,590.35/x
  3. Step 3: Cross multiply
    710,879.03x = 981,012.79 × 388,590.35
  4. Step 4: Simplify right side
    710,879.03x = 381,212,105,873.11
  5. Step 5: Solve for x
    x = 381,212,105,873.11/710,879.03
  6. Step 6: Final answer
    x = 536,254.54

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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.