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Finding the Fourth Proportional to 975.95, 1,463.18 and 489.35

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Solution

The fourth proportional to 975.95, 1,463.18 and 489.35 is: 733.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.95 : 1,463.18 = 489.35 : x
  2. Step 2: Convert to fraction form
    975.95/1,463.18 = 489.35/x
  3. Step 3: Cross multiply
    975.95x = 1,463.18 × 489.35
  4. Step 4: Simplify right side
    975.95x = 716,007.13
  5. Step 5: Solve for x
    x = 716,007.13/975.95
  6. Step 6: Final answer
    x = 733.65

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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.