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Finding the Fourth Proportional to 1,038.15, 1,432.01 and 618.22

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Solution

The fourth proportional to 1,038.15, 1,432.01 and 618.22 is: 852.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.15 : 1,432.01 = 618.22 : x
  2. Step 2: Convert to fraction form
    1,038.15/1,432.01 = 618.22/x
  3. Step 3: Cross multiply
    1,038.15x = 1,432.01 × 618.22
  4. Step 4: Simplify right side
    1,038.15x = 885,297.22
  5. Step 5: Solve for x
    x = 885,297.22/1,038.15
  6. Step 6: Final answer
    x = 852.76

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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.