Home / 1,681.61-2,320.45-935.55

Finding the Fourth Proportional to 1,681.61, 2,320.45 and 935.55

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Solution

The fourth proportional to 1,681.61, 2,320.45 and 935.55 is: 1,290.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.61 : 2,320.45 = 935.55 : x
  2. Step 2: Convert to fraction form
    1,681.61/2,320.45 = 935.55/x
  3. Step 3: Cross multiply
    1,681.61x = 2,320.45 × 935.55
  4. Step 4: Simplify right side
    1,681.61x = 2,170,897.00
  5. Step 5: Solve for x
    x = 2,170,897.00/1,681.61
  6. Step 6: Final answer
    x = 1,290.96

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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.