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Finding the Fourth Proportional to 1,206.36, 1,809.54 and 693

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Solution

The fourth proportional to 1,206.36, 1,809.54 and 693 is: 1,039.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.36 : 1,809.54 = 693 : x
  2. Step 2: Convert to fraction form
    1,206.36/1,809.54 = 693/x
  3. Step 3: Cross multiply
    1,206.36x = 1,809.54 × 693
  4. Step 4: Simplify right side
    1,206.36x = 1,254,011.22
  5. Step 5: Solve for x
    x = 1,254,011.22/1,206.36
  6. Step 6: Final answer
    x = 1,039.50

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.