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Finding the Fourth Proportional to 340.20, 507.49 and 305.57

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Solution

The fourth proportional to 340.20, 507.49 and 305.57 is: 455.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.20 : 507.49 = 305.57 : x
  2. Step 2: Convert to fraction form
    340.20/507.49 = 305.57/x
  3. Step 3: Cross multiply
    340.20x = 507.49 × 305.57
  4. Step 4: Simplify right side
    340.20x = 155,075.08
  5. Step 5: Solve for x
    x = 155,075.08/340.20
  6. Step 6: Final answer
    x = 455.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.