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Finding the Fourth Proportional to 1,681.09, 2,320.07 and 935.10

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Solution

The fourth proportional to 1,681.09, 2,320.07 and 935.10 is: 1,290.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.09 : 2,320.07 = 935.10 : x
  2. Step 2: Convert to fraction form
    1,681.09/2,320.07 = 935.10/x
  3. Step 3: Cross multiply
    1,681.09x = 2,320.07 × 935.10
  4. Step 4: Simplify right side
    1,681.09x = 2,169,492.78
  5. Step 5: Solve for x
    x = 2,169,492.78/1,681.09
  6. Step 6: Final answer
    x = 1,290.53

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Double scale
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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.