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Finding the Fourth Proportional to 946.40, 1,305.63 and 651.15

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Solution

The fourth proportional to 946.40, 1,305.63 and 651.15 is: 898.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.40 : 1,305.63 = 651.15 : x
  2. Step 2: Convert to fraction form
    946.40/1,305.63 = 651.15/x
  3. Step 3: Cross multiply
    946.40x = 1,305.63 × 651.15
  4. Step 4: Simplify right side
    946.40x = 850,160.97
  5. Step 5: Solve for x
    x = 850,160.97/946.40
  6. Step 6: Final answer
    x = 898.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.