Home / 1,319.61-1,816.38-964.92

Finding the Fourth Proportional to 1,319.61, 1,816.38 and 964.92

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Solution

The fourth proportional to 1,319.61, 1,816.38 and 964.92 is: 1,328.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.61 : 1,816.38 = 964.92 : x
  2. Step 2: Convert to fraction form
    1,319.61/1,816.38 = 964.92/x
  3. Step 3: Cross multiply
    1,319.61x = 1,816.38 × 964.92
  4. Step 4: Simplify right side
    1,319.61x = 1,752,661.39
  5. Step 5: Solve for x
    x = 1,752,661.39/1,319.61
  6. Step 6: Final answer
    x = 1,328.17

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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.