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Finding the Fourth Proportional to 321,666.80, 482,807.40 and 274,972.40

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Solution

The fourth proportional to 321,666.80, 482,807.40 and 274,972.40 is: 412,721.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,666.80 : 482,807.40 = 274,972.40 : x
  2. Step 2: Convert to fraction form
    321,666.80/482,807.40 = 274,972.40/x
  3. Step 3: Cross multiply
    321,666.80x = 482,807.40 × 274,972.40
  4. Step 4: Simplify right side
    321,666.80x = 132,758,709,515.76
  5. Step 5: Solve for x
    x = 132,758,709,515.76/321,666.80
  6. Step 6: Final answer
    x = 412,721.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.