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Finding the Fourth Proportional to 605.47, 907.70 and 281.07

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Solution

The fourth proportional to 605.47, 907.70 and 281.07 is: 421.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.47 : 907.70 = 281.07 : x
  2. Step 2: Convert to fraction form
    605.47/907.70 = 281.07/x
  3. Step 3: Cross multiply
    605.47x = 907.70 × 281.07
  4. Step 4: Simplify right side
    605.47x = 255,127.24
  5. Step 5: Solve for x
    x = 255,127.24/605.47
  6. Step 6: Final answer
    x = 421.37

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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.