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Finding the Fourth Proportional to 970.14, 1,454.51 and 579.21

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Solution

The fourth proportional to 970.14, 1,454.51 and 579.21 is: 868.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.14 : 1,454.51 = 579.21 : x
  2. Step 2: Convert to fraction form
    970.14/1,454.51 = 579.21/x
  3. Step 3: Cross multiply
    970.14x = 1,454.51 × 579.21
  4. Step 4: Simplify right side
    970.14x = 842,468.19
  5. Step 5: Solve for x
    x = 842,468.19/970.14
  6. Step 6: Final answer
    x = 868.40

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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.