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Finding the Fourth Proportional to 397,142.80, 548,136.82 and 235,966.87

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Solution

The fourth proportional to 397,142.80, 548,136.82 and 235,966.87 is: 325,681.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,142.80 : 548,136.82 = 235,966.87 : x
  2. Step 2: Convert to fraction form
    397,142.80/548,136.82 = 235,966.87/x
  3. Step 3: Cross multiply
    397,142.80x = 548,136.82 × 235,966.87
  4. Step 4: Simplify right side
    397,142.80x = 129,342,130,727.28
  5. Step 5: Solve for x
    x = 129,342,130,727.28/397,142.80
  6. Step 6: Final answer
    x = 325,681.67

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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.