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Finding the Fourth Proportional to 972.36, 1,341.76 and 579.32

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Solution

The fourth proportional to 972.36, 1,341.76 and 579.32 is: 799.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.36 : 1,341.76 = 579.32 : x
  2. Step 2: Convert to fraction form
    972.36/1,341.76 = 579.32/x
  3. Step 3: Cross multiply
    972.36x = 1,341.76 × 579.32
  4. Step 4: Simplify right side
    972.36x = 777,308.40
  5. Step 5: Solve for x
    x = 777,308.40/972.36
  6. Step 6: Final answer
    x = 799.40

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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.