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Finding the Fourth Proportional to 1,971.96, 2,957.93 and 655.81

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Solution

The fourth proportional to 1,971.96, 2,957.93 and 655.81 is: 983.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.96 : 2,957.93 = 655.81 : x
  2. Step 2: Convert to fraction form
    1,971.96/2,957.93 = 655.81/x
  3. Step 3: Cross multiply
    1,971.96x = 2,957.93 × 655.81
  4. Step 4: Simplify right side
    1,971.96x = 1,939,829.40
  5. Step 5: Solve for x
    x = 1,939,829.40/1,971.96
  6. Step 6: Final answer
    x = 983.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.