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Finding the Fourth Proportional to 1,179.10, 1,768.20 and 357.10

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Solution

The fourth proportional to 1,179.10, 1,768.20 and 357.10 is: 535.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.10 : 1,768.20 = 357.10 : x
  2. Step 2: Convert to fraction form
    1,179.10/1,768.20 = 357.10/x
  3. Step 3: Cross multiply
    1,179.10x = 1,768.20 × 357.10
  4. Step 4: Simplify right side
    1,179.10x = 631,424.22
  5. Step 5: Solve for x
    x = 631,424.22/1,179.10
  6. Step 6: Final answer
    x = 535.51

Related Problems

Find fourth proportional to 589.55, 884.10 and 178.55
Half scale
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Double scale
Find fourth proportional to 1,180.10, 1,769.70 and 358.10
Similar ratio
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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.