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Finding the Fourth Proportional to 1,237.45, 1,707.71 and 740.79

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Solution

The fourth proportional to 1,237.45, 1,707.71 and 740.79 is: 1,022.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.45 : 1,707.71 = 740.79 : x
  2. Step 2: Convert to fraction form
    1,237.45/1,707.71 = 740.79/x
  3. Step 3: Cross multiply
    1,237.45x = 1,707.71 × 740.79
  4. Step 4: Simplify right side
    1,237.45x = 1,265,054.49
  5. Step 5: Solve for x
    x = 1,265,054.49/1,237.45
  6. Step 6: Final answer
    x = 1,022.31

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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.