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Finding the Fourth Proportional to 515.03, 710.12 and 357.80

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Solution

The fourth proportional to 515.03, 710.12 and 357.80 is: 493.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.03 : 710.12 = 357.80 : x
  2. Step 2: Convert to fraction form
    515.03/710.12 = 357.80/x
  3. Step 3: Cross multiply
    515.03x = 710.12 × 357.80
  4. Step 4: Simplify right side
    515.03x = 254,075.60
  5. Step 5: Solve for x
    x = 254,075.60/515.03
  6. Step 6: Final answer
    x = 493.32

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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.