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Finding the Fourth Proportional to 515.49, 710.55 and 358.35

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Solution

The fourth proportional to 515.49, 710.55 and 358.35 is: 493.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.49 : 710.55 = 358.35 : x
  2. Step 2: Convert to fraction form
    515.49/710.55 = 358.35/x
  3. Step 3: Cross multiply
    515.49x = 710.55 × 358.35
  4. Step 4: Simplify right side
    515.49x = 254,625.59
  5. Step 5: Solve for x
    x = 254,625.59/515.49
  6. Step 6: Final answer
    x = 493.95

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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.