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Finding the Fourth Proportional to 1,207.45, 1,666.17 and 703.22

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Solution

The fourth proportional to 1,207.45, 1,666.17 and 703.22 is: 970.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.45 : 1,666.17 = 703.22 : x
  2. Step 2: Convert to fraction form
    1,207.45/1,666.17 = 703.22/x
  3. Step 3: Cross multiply
    1,207.45x = 1,666.17 × 703.22
  4. Step 4: Simplify right side
    1,207.45x = 1,171,684.07
  5. Step 5: Solve for x
    x = 1,171,684.07/1,207.45
  6. Step 6: Final answer
    x = 970.38

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.