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Finding the Fourth Proportional to 770.49, 1,155.51 and 250.47

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Solution

The fourth proportional to 770.49, 1,155.51 and 250.47 is: 375.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.49 : 1,155.51 = 250.47 : x
  2. Step 2: Convert to fraction form
    770.49/1,155.51 = 250.47/x
  3. Step 3: Cross multiply
    770.49x = 1,155.51 × 250.47
  4. Step 4: Simplify right side
    770.49x = 289,420.59
  5. Step 5: Solve for x
    x = 289,420.59/770.49
  6. Step 6: Final answer
    x = 375.63

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1.5x scale

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.