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Finding the Fourth Proportional to 509,491.80, 763,362.90 and 331,907.40

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Solution

The fourth proportional to 509,491.80, 763,362.90 and 331,907.40 is: 497,291.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,491.80 : 763,362.90 = 331,907.40 : x
  2. Step 2: Convert to fraction form
    509,491.80/763,362.90 = 331,907.40/x
  3. Step 3: Cross multiply
    509,491.80x = 763,362.90 × 331,907.40
  4. Step 4: Simplify right side
    509,491.80x = 253,365,795,395.46
  5. Step 5: Solve for x
    x = 253,365,795,395.46/509,491.80
  6. Step 6: Final answer
    x = 497,291.21

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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.