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Finding the Fourth Proportional to 1,090.96, 1,636.12 and 360.40

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Solution

The fourth proportional to 1,090.96, 1,636.12 and 360.40 is: 540.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.96 : 1,636.12 = 360.40 : x
  2. Step 2: Convert to fraction form
    1,090.96/1,636.12 = 360.40/x
  3. Step 3: Cross multiply
    1,090.96x = 1,636.12 × 360.40
  4. Step 4: Simplify right side
    1,090.96x = 589,657.65
  5. Step 5: Solve for x
    x = 589,657.65/1,090.96
  6. Step 6: Final answer
    x = 540.49

Related Problems

Find fourth proportional to 545.48, 818.06 and 180.20
Half scale
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Double scale
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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.