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Finding the Fourth Proportional to 1,270.15, 1,752.91 and 710.64

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Solution

The fourth proportional to 1,270.15, 1,752.91 and 710.64 is: 980.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.15 : 1,752.91 = 710.64 : x
  2. Step 2: Convert to fraction form
    1,270.15/1,752.91 = 710.64/x
  3. Step 3: Cross multiply
    1,270.15x = 1,752.91 × 710.64
  4. Step 4: Simplify right side
    1,270.15x = 1,245,686.19
  5. Step 5: Solve for x
    x = 1,245,686.19/1,270.15
  6. Step 6: Final answer
    x = 980.74

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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.