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Finding the Fourth Proportional to 388,660.86, 536,599.62 and 317,211.30

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Solution

The fourth proportional to 388,660.86, 536,599.62 and 317,211.30 is: 437,953.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,660.86 : 536,599.62 = 317,211.30 : x
  2. Step 2: Convert to fraction form
    388,660.86/536,599.62 = 317,211.30/x
  3. Step 3: Cross multiply
    388,660.86x = 536,599.62 × 317,211.30
  4. Step 4: Simplify right side
    388,660.86x = 170,215,463,039.71
  5. Step 5: Solve for x
    x = 170,215,463,039.71/388,660.86
  6. Step 6: Final answer
    x = 437,953.70

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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.