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Finding the Fourth Proportional to 972.66, 1,456.59 and 928.23

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Solution

The fourth proportional to 972.66, 1,456.59 and 928.23 is: 1,390.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.66 : 1,456.59 = 928.23 : x
  2. Step 2: Convert to fraction form
    972.66/1,456.59 = 928.23/x
  3. Step 3: Cross multiply
    972.66x = 1,456.59 × 928.23
  4. Step 4: Simplify right side
    972.66x = 1,352,050.54
  5. Step 5: Solve for x
    x = 1,352,050.54/972.66
  6. Step 6: Final answer
    x = 1,390.05

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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.