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Finding the Fourth Proportional to 713,136.80, 984,136.48 and 390,839.96

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Solution

The fourth proportional to 713,136.80, 984,136.48 and 390,839.96 is: 539,363.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,136.80 : 984,136.48 = 390,839.96 : x
  2. Step 2: Convert to fraction form
    713,136.80/984,136.48 = 390,839.96/x
  3. Step 3: Cross multiply
    713,136.80x = 984,136.48 × 390,839.96
  4. Step 4: Simplify right side
    713,136.80x = 384,639,856,579.96
  5. Step 5: Solve for x
    x = 384,639,856,579.96/713,136.80
  6. Step 6: Final answer
    x = 539,363.36

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1.5x scale

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.