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Finding the Fourth Proportional to 1,948.04, 2,922.60 and 715.40

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Solution

The fourth proportional to 1,948.04, 2,922.60 and 715.40 is: 1,073.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,948.04 : 2,922.60 = 715.40 : x
  2. Step 2: Convert to fraction form
    1,948.04/2,922.60 = 715.40/x
  3. Step 3: Cross multiply
    1,948.04x = 2,922.60 × 715.40
  4. Step 4: Simplify right side
    1,948.04x = 2,090,828.04
  5. Step 5: Solve for x
    x = 2,090,828.04/1,948.04
  6. Step 6: Final answer
    x = 1,073.30

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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.