Home / 1,685.21-2,326.02-976.91

Finding the Fourth Proportional to 1,685.21, 2,326.02 and 976.91

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Solution

The fourth proportional to 1,685.21, 2,326.02 and 976.91 is: 1,348.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.21 : 2,326.02 = 976.91 : x
  2. Step 2: Convert to fraction form
    1,685.21/2,326.02 = 976.91/x
  3. Step 3: Cross multiply
    1,685.21x = 2,326.02 × 976.91
  4. Step 4: Simplify right side
    1,685.21x = 2,272,312.20
  5. Step 5: Solve for x
    x = 2,272,312.20/1,685.21
  6. Step 6: Final answer
    x = 1,348.39

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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.