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Finding the Fourth Proportional to 710,898.53, 981,039.74 and 388,609.92

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Solution

The fourth proportional to 710,898.53, 981,039.74 and 388,609.92 is: 536,281.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,898.53 : 981,039.74 = 388,609.92 : x
  2. Step 2: Convert to fraction form
    710,898.53/981,039.74 = 388,609.92/x
  3. Step 3: Cross multiply
    710,898.53x = 981,039.74 × 388,609.92
  4. Step 4: Simplify right side
    710,898.53x = 381,241,772,935.17
  5. Step 5: Solve for x
    x = 381,241,772,935.17/710,898.53
  6. Step 6: Final answer
    x = 536,281.56

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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.