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Finding the Fourth Proportional to 1,289.95, 1,934.71 and 468.61

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Solution

The fourth proportional to 1,289.95, 1,934.71 and 468.61 is: 702.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.95 : 1,934.71 = 468.61 : x
  2. Step 2: Convert to fraction form
    1,289.95/1,934.71 = 468.61/x
  3. Step 3: Cross multiply
    1,289.95x = 1,934.71 × 468.61
  4. Step 4: Simplify right side
    1,289.95x = 906,624.45
  5. Step 5: Solve for x
    x = 906,624.45/1,289.95
  6. Step 6: Final answer
    x = 702.84

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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.