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Finding the Fourth Proportional to 713,136.42, 984,135.96 and 390,839.58

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Solution

The fourth proportional to 713,136.42, 984,135.96 and 390,839.58 is: 539,362.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,136.42 : 984,135.96 = 390,839.58 : x
  2. Step 2: Convert to fraction form
    713,136.42/984,135.96 = 390,839.58/x
  3. Step 3: Cross multiply
    713,136.42x = 984,135.96 × 390,839.58
  4. Step 4: Simplify right side
    713,136.42x = 384,639,285,269.30
  5. Step 5: Solve for x
    x = 384,639,285,269.30/713,136.42
  6. Step 6: Final answer
    x = 539,362.84

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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.