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Finding the Fourth Proportional to 770.51, 1,155.08 and 360.14

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Solution

The fourth proportional to 770.51, 1,155.08 and 360.14 is: 539.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.51 : 1,155.08 = 360.14 : x
  2. Step 2: Convert to fraction form
    770.51/1,155.08 = 360.14/x
  3. Step 3: Cross multiply
    770.51x = 1,155.08 × 360.14
  4. Step 4: Simplify right side
    770.51x = 415,988.71
  5. Step 5: Solve for x
    x = 415,988.71/770.51
  6. Step 6: Final answer
    x = 539.89

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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.