Home / 1,681.34-2,320.16-935.15

Finding the Fourth Proportional to 1,681.34, 2,320.16 and 935.15

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Solution

The fourth proportional to 1,681.34, 2,320.16 and 935.15 is: 1,290.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.34 : 2,320.16 = 935.15 : x
  2. Step 2: Convert to fraction form
    1,681.34/2,320.16 = 935.15/x
  3. Step 3: Cross multiply
    1,681.34x = 2,320.16 × 935.15
  4. Step 4: Simplify right side
    1,681.34x = 2,169,698.75
  5. Step 5: Solve for x
    x = 2,169,698.75/1,681.34
  6. Step 6: Final answer
    x = 1,290.46

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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.