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Finding the Fourth Proportional to 1,277.85, 1,762.93 and 718.19

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Solution

The fourth proportional to 1,277.85, 1,762.93 and 718.19 is: 990.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.85 : 1,762.93 = 718.19 : x
  2. Step 2: Convert to fraction form
    1,277.85/1,762.93 = 718.19/x
  3. Step 3: Cross multiply
    1,277.85x = 1,762.93 × 718.19
  4. Step 4: Simplify right side
    1,277.85x = 1,266,116.49
  5. Step 5: Solve for x
    x = 1,266,116.49/1,277.85
  6. Step 6: Final answer
    x = 990.82

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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.