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Finding the Fourth Proportional to 1,270.69, 1,753.44 and 710.98

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Solution

The fourth proportional to 1,270.69, 1,753.44 and 710.98 is: 981.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.69 : 1,753.44 = 710.98 : x
  2. Step 2: Convert to fraction form
    1,270.69/1,753.44 = 710.98/x
  3. Step 3: Cross multiply
    1,270.69x = 1,753.44 × 710.98
  4. Step 4: Simplify right side
    1,270.69x = 1,246,653.72
  5. Step 5: Solve for x
    x = 1,246,653.72/1,270.69
  6. Step 6: Final answer
    x = 981.09

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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.