Home / 1,512.18-2,088.30-988.50

Finding the Fourth Proportional to 1,512.18, 2,088.30 and 988.50

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Solution

The fourth proportional to 1,512.18, 2,088.30 and 988.50 is: 1,365.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,512.18 : 2,088.30 = 988.50 : x
  2. Step 2: Convert to fraction form
    1,512.18/2,088.30 = 988.50/x
  3. Step 3: Cross multiply
    1,512.18x = 2,088.30 × 988.50
  4. Step 4: Simplify right side
    1,512.18x = 2,064,284.55
  5. Step 5: Solve for x
    x = 2,064,284.55/1,512.18
  6. Step 6: Final answer
    x = 1,365.11

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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.