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Finding the Fourth Proportional to 860.49, 1,288.35 and 651.62

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Solution

The fourth proportional to 860.49, 1,288.35 and 651.62 is: 975.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.49 : 1,288.35 = 651.62 : x
  2. Step 2: Convert to fraction form
    860.49/1,288.35 = 651.62/x
  3. Step 3: Cross multiply
    860.49x = 1,288.35 × 651.62
  4. Step 4: Simplify right side
    860.49x = 839,508.19
  5. Step 5: Solve for x
    x = 839,508.19/860.49
  6. Step 6: Final answer
    x = 975.62

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1.5x scale

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.