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Finding the Fourth Proportional to 970.88, 1,454.13 and 809.28

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Solution

The fourth proportional to 970.88, 1,454.13 and 809.28 is: 1,212.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.88 : 1,454.13 = 809.28 : x
  2. Step 2: Convert to fraction form
    970.88/1,454.13 = 809.28/x
  3. Step 3: Cross multiply
    970.88x = 1,454.13 × 809.28
  4. Step 4: Simplify right side
    970.88x = 1,176,798.33
  5. Step 5: Solve for x
    x = 1,176,798.33/970.88
  6. Step 6: Final answer
    x = 1,212.10

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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.