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Finding the Fourth Proportional to 975.91, 1,464.32 and 489.28

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Solution

The fourth proportional to 975.91, 1,464.32 and 489.28 is: 734.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.91 : 1,464.32 = 489.28 : x
  2. Step 2: Convert to fraction form
    975.91/1,464.32 = 489.28/x
  3. Step 3: Cross multiply
    975.91x = 1,464.32 × 489.28
  4. Step 4: Simplify right side
    975.91x = 716,462.49
  5. Step 5: Solve for x
    x = 716,462.49/975.91
  6. Step 6: Final answer
    x = 734.15

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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.