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Finding the Fourth Proportional to 2,688.74, 4,032.63 and 741.09

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Solution

The fourth proportional to 2,688.74, 4,032.63 and 741.09 is: 1,111.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.74 : 4,032.63 = 741.09 : x
  2. Step 2: Convert to fraction form
    2,688.74/4,032.63 = 741.09/x
  3. Step 3: Cross multiply
    2,688.74x = 4,032.63 × 741.09
  4. Step 4: Simplify right side
    2,688.74x = 2,988,541.77
  5. Step 5: Solve for x
    x = 2,988,541.77/2,688.74
  6. Step 6: Final answer
    x = 1,111.50

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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.