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Finding the Fourth Proportional to 515.08, 710.56 and 340.12

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Solution

The fourth proportional to 515.08, 710.56 and 340.12 is: 469.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.08 : 710.56 = 340.12 : x
  2. Step 2: Convert to fraction form
    515.08/710.56 = 340.12/x
  3. Step 3: Cross multiply
    515.08x = 710.56 × 340.12
  4. Step 4: Simplify right side
    515.08x = 241,675.67
  5. Step 5: Solve for x
    x = 241,675.67/515.08
  6. Step 6: Final answer
    x = 469.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.