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Finding the Fourth Proportional to 613.90, 921.53 and 340.26

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Solution

The fourth proportional to 613.90, 921.53 and 340.26 is: 510.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.90 : 921.53 = 340.26 : x
  2. Step 2: Convert to fraction form
    613.90/921.53 = 340.26/x
  3. Step 3: Cross multiply
    613.90x = 921.53 × 340.26
  4. Step 4: Simplify right side
    613.90x = 313,559.80
  5. Step 5: Solve for x
    x = 313,559.80/613.90
  6. Step 6: Final answer
    x = 510.77

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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.