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Finding the Fourth Proportional to 1,115.44, 1,673.09 and 385.03

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Solution

The fourth proportional to 1,115.44, 1,673.09 and 385.03 is: 577.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.44 : 1,673.09 = 385.03 : x
  2. Step 2: Convert to fraction form
    1,115.44/1,673.09 = 385.03/x
  3. Step 3: Cross multiply
    1,115.44x = 1,673.09 × 385.03
  4. Step 4: Simplify right side
    1,115.44x = 644,189.84
  5. Step 5: Solve for x
    x = 644,189.84/1,115.44
  6. Step 6: Final answer
    x = 577.52

Related Problems

Find fourth proportional to 557.72, 836.55 and 192.52
Half scale
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Double scale
Find fourth proportional to 1,116.44, 1,674.59 and 386.03
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.