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Finding the Fourth Proportional to 1,386.03, 2,079.39 and 693

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Solution

The fourth proportional to 1,386.03, 2,079.39 and 693 is: 1,039.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.03 : 2,079.39 = 693 : x
  2. Step 2: Convert to fraction form
    1,386.03/2,079.39 = 693/x
  3. Step 3: Cross multiply
    1,386.03x = 2,079.39 × 693
  4. Step 4: Simplify right side
    1,386.03x = 1,441,017.27
  5. Step 5: Solve for x
    x = 1,441,017.27/1,386.03
  6. Step 6: Final answer
    x = 1,039.67

Related Problems

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Half scale
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Double scale
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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.