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Finding the Fourth Proportional to 4,065.40, 6,098.10 and 987.40

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Solution

The fourth proportional to 4,065.40, 6,098.10 and 987.40 is: 1,481.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,065.40 : 6,098.10 = 987.40 : x
  2. Step 2: Convert to fraction form
    4,065.40/6,098.10 = 987.40/x
  3. Step 3: Cross multiply
    4,065.40x = 6,098.10 × 987.40
  4. Step 4: Simplify right side
    4,065.40x = 6,021,263.94
  5. Step 5: Solve for x
    x = 6,021,263.94/4,065.40
  6. Step 6: Final answer
    x = 1,481.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.