Home / 1,290.18-1,935.24-316.26

Finding the Fourth Proportional to 1,290.18, 1,935.24 and 316.26

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Solution

The fourth proportional to 1,290.18, 1,935.24 and 316.26 is: 474.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.18 : 1,935.24 = 316.26 : x
  2. Step 2: Convert to fraction form
    1,290.18/1,935.24 = 316.26/x
  3. Step 3: Cross multiply
    1,290.18x = 1,935.24 × 316.26
  4. Step 4: Simplify right side
    1,290.18x = 612,039.00
  5. Step 5: Solve for x
    x = 612,039.00/1,290.18
  6. Step 6: Final answer
    x = 474.38

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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.