Home / 1,225.80-1,690.32-946.08

Finding the Fourth Proportional to 1,225.80, 1,690.32 and 946.08

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Solution

The fourth proportional to 1,225.80, 1,690.32 and 946.08 is: 1,304.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.80 : 1,690.32 = 946.08 : x
  2. Step 2: Convert to fraction form
    1,225.80/1,690.32 = 946.08/x
  3. Step 3: Cross multiply
    1,225.80x = 1,690.32 × 946.08
  4. Step 4: Simplify right side
    1,225.80x = 1,599,177.95
  5. Step 5: Solve for x
    x = 1,599,177.95/1,225.80
  6. Step 6: Final answer
    x = 1,304.60

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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.