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Finding the Fourth Proportional to 770.24, 1,152.60 and 718.75

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Solution

The fourth proportional to 770.24, 1,152.60 and 718.75 is: 1,075.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.24 : 1,152.60 = 718.75 : x
  2. Step 2: Convert to fraction form
    770.24/1,152.60 = 718.75/x
  3. Step 3: Cross multiply
    770.24x = 1,152.60 × 718.75
  4. Step 4: Simplify right side
    770.24x = 828,431.25
  5. Step 5: Solve for x
    x = 828,431.25/770.24
  6. Step 6: Final answer
    x = 1,075.55

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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.