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Finding the Fourth Proportional to 710,878.53, 981,012.10 and 388,589.85

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Solution

The fourth proportional to 710,878.53, 981,012.10 and 388,589.85 is: 536,253.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,878.53 : 981,012.10 = 388,589.85 : x
  2. Step 2: Convert to fraction form
    710,878.53/981,012.10 = 388,589.85/x
  3. Step 3: Cross multiply
    710,878.53x = 981,012.10 × 388,589.85
  4. Step 4: Simplify right side
    710,878.53x = 381,211,347,239.72
  5. Step 5: Solve for x
    x = 381,211,347,239.72/710,878.53
  6. Step 6: Final answer
    x = 536,253.85

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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.