Home / 1,290.04-1,935.26-424.12

Finding the Fourth Proportional to 1,290.04, 1,935.26 and 424.12

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Solution

The fourth proportional to 1,290.04, 1,935.26 and 424.12 is: 636.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.04 : 1,935.26 = 424.12 : x
  2. Step 2: Convert to fraction form
    1,290.04/1,935.26 = 424.12/x
  3. Step 3: Cross multiply
    1,290.04x = 1,935.26 × 424.12
  4. Step 4: Simplify right side
    1,290.04x = 820,782.47
  5. Step 5: Solve for x
    x = 820,782.47/1,290.04
  6. Step 6: Final answer
    x = 636.25

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Half scale
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Double scale
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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.