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Finding the Fourth Proportional to 1,454.31, 2,172.62 and 930.12

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Solution

The fourth proportional to 1,454.31, 2,172.62 and 930.12 is: 1,389.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,454.31 : 2,172.62 = 930.12 : x
  2. Step 2: Convert to fraction form
    1,454.31/2,172.62 = 930.12/x
  3. Step 3: Cross multiply
    1,454.31x = 2,172.62 × 930.12
  4. Step 4: Simplify right side
    1,454.31x = 2,020,792.66
  5. Step 5: Solve for x
    x = 2,020,792.66/1,454.31
  6. Step 6: Final answer
    x = 1,389.52

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1.5x scale

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.