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Finding the Fourth Proportional to 1,827.15, 2,521.46 and 987.84

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Solution

The fourth proportional to 1,827.15, 2,521.46 and 987.84 is: 1,363.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,827.15 : 2,521.46 = 987.84 : x
  2. Step 2: Convert to fraction form
    1,827.15/2,521.46 = 987.84/x
  3. Step 3: Cross multiply
    1,827.15x = 2,521.46 × 987.84
  4. Step 4: Simplify right side
    1,827.15x = 2,490,800.41
  5. Step 5: Solve for x
    x = 2,490,800.41/1,827.15
  6. Step 6: Final answer
    x = 1,363.22

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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.