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Finding the Fourth Proportional to 1,144.68, 1,710.48 and 776.40

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Solution

The fourth proportional to 1,144.68, 1,710.48 and 776.40 is: 1,160.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.68 : 1,710.48 = 776.40 : x
  2. Step 2: Convert to fraction form
    1,144.68/1,710.48 = 776.40/x
  3. Step 3: Cross multiply
    1,144.68x = 1,710.48 × 776.40
  4. Step 4: Simplify right side
    1,144.68x = 1,328,016.67
  5. Step 5: Solve for x
    x = 1,328,016.67/1,144.68
  6. Step 6: Final answer
    x = 1,160.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.