Home / 1,681.15-2,319.94-935.09

Finding the Fourth Proportional to 1,681.15, 2,319.94 and 935.09

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Solution

The fourth proportional to 1,681.15, 2,319.94 and 935.09 is: 1,290.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.15 : 2,319.94 = 935.09 : x
  2. Step 2: Convert to fraction form
    1,681.15/2,319.94 = 935.09/x
  3. Step 3: Cross multiply
    1,681.15x = 2,319.94 × 935.09
  4. Step 4: Simplify right side
    1,681.15x = 2,169,356.16
  5. Step 5: Solve for x
    x = 2,169,356.16/1,681.15
  6. Step 6: Final answer
    x = 1,290.40

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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.