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Finding the Fourth Proportional to 1,234.21, 1,703.28 and 710.32

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Solution

The fourth proportional to 1,234.21, 1,703.28 and 710.32 is: 980.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,234.21 : 1,703.28 = 710.32 : x
  2. Step 2: Convert to fraction form
    1,234.21/1,703.28 = 710.32/x
  3. Step 3: Cross multiply
    1,234.21x = 1,703.28 × 710.32
  4. Step 4: Simplify right side
    1,234.21x = 1,209,873.85
  5. Step 5: Solve for x
    x = 1,209,873.85/1,234.21
  6. Step 6: Final answer
    x = 980.28

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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.