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Finding the Fourth Proportional to 1,444.71, 1,993.67 and 815.24

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Solution

The fourth proportional to 1,444.71, 1,993.67 and 815.24 is: 1,125.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,444.71 : 1,993.67 = 815.24 : x
  2. Step 2: Convert to fraction form
    1,444.71/1,993.67 = 815.24/x
  3. Step 3: Cross multiply
    1,444.71x = 1,993.67 × 815.24
  4. Step 4: Simplify right side
    1,444.71x = 1,625,319.08
  5. Step 5: Solve for x
    x = 1,625,319.08/1,444.71
  6. Step 6: Final answer
    x = 1,125.01

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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.