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Finding the Fourth Proportional to 1,234.13, 1,703.21 and 710.28

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Solution

The fourth proportional to 1,234.13, 1,703.21 and 710.28 is: 980.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,234.13 : 1,703.21 = 710.28 : x
  2. Step 2: Convert to fraction form
    1,234.13/1,703.21 = 710.28/x
  3. Step 3: Cross multiply
    1,234.13x = 1,703.21 × 710.28
  4. Step 4: Simplify right side
    1,234.13x = 1,209,752.45
  5. Step 5: Solve for x
    x = 1,209,752.45/1,234.13
  6. Step 6: Final answer
    x = 980.25

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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.