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Finding the Fourth Proportional to 3,070.21, 4,605.27 and 761.71

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Solution

The fourth proportional to 3,070.21, 4,605.27 and 761.71 is: 1,142.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,070.21 : 4,605.27 = 761.71 : x
  2. Step 2: Convert to fraction form
    3,070.21/4,605.27 = 761.71/x
  3. Step 3: Cross multiply
    3,070.21x = 4,605.27 × 761.71
  4. Step 4: Simplify right side
    3,070.21x = 3,507,880.21
  5. Step 5: Solve for x
    x = 3,507,880.21/3,070.21
  6. Step 6: Final answer
    x = 1,142.55

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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.